Document:

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                                                                   EXHIBIT 10.27

                               PURCHASE AGREEMENT

                                 by and between

                               MITSUI & CO., LTD.

                                       and

                             UNITED AUTO GROUP, INC.

                                   dated as of

                                January 31, 2001

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                               PURCHASE AGREEMENT

         PURCHASE AGREEMENT (the "Agreement") is dated January 31, 2001, by and
between UNITED AUTO GROUP, INC., a Delaware corporation (the "Company"), and
MITSUI & CO., LTD., a Japanese company, or one of its affiliates (the
"Purchaser").

                                    RECITALS

         WHEREAS, the Company desires to sell to the Purchaser, and the
Purchaser desires to purchase from the Company, 1,302,326 shares of Voting
Common Stock, par value $0.0001 per share of the Company, for a purchase price
of $10.75 per share;

         NOW, THEREFORE, in consideration of the mutual promises and of the
mutual covenants, representations and warranties and obligations hereinafter set
forth, for good and valuable consideration, the receipt and sufficiency of which
is hereby acknowledged, the parties agree as follows:

                                   ARTICLE I

                         SALE AND PURCHASE OF SECURITIES

         1.1 The Purchase. At the Closing, subject to the terms and conditions
hereof, the Purchaser shall purchase (the "Purchase") from the Company, and the
Company shall sell to the Purchaser, an aggregate of 1,302,326 shares of Voting
Common Stock of the Company (the "Securities") at a purchase price of $10.75 per
share and an aggregate purchase price of $14,000,004.50 (the "Purchase Price")
payable at the Closing.

         1.2 Use of Proceeds. The Company will use the proceeds of the Purchase
for general corporate purposes.

         1.3 The Closing. The closing of the sale and purchase of the Securities
(the "Closing") shall take place at the offices of Debevoise & Plimpton, 875
Third Avenue, New York, New York, at 10:00 a.m. on February 28, 2001 unless the
parties otherwise agree in writing (the "Closing Date").

         1.4 Actions at the Closing. At Closing, the following actions shall
occur (the "Closing Actions"):

                  (a) The Company shall issue and deliver to the Purchaser the
Securities, evidenced by stock certificates in the name of the Purchaser, free
and clear of liens and encumbrances thereon.

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                  (b) The Purchaser shall pay the Purchase Price to the account
of the Company by wire transfer pursuant to instructions provided by the Company
at least five business days prior to the Closing Date.

                  (c) The Company shall make the other deliveries required by
Article IV.

                  (d) The Company shall have filed with the New York Stock
Exchange an Application for Listing of Additional Shares with respect to the
Securities.

         1.5 Legend.

                  (a) The parties hereby acknowledge and agree that each of the
certificates representing the Securities shall include the following legend and
any other legend required by law:

         THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
         UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT") AND
         MAY BE OFFERED OR SOLD ONLY IF REGISTERED UNDER THE SECURITIES ACT OR
         PURSUANT TO AN AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS
         OF THE SECURITIES ACT.

                  (b) The requirement that the above securities legend be placed
upon certificates evidencing shares of Securities shall cease and terminate upon
the earliest of the following events: (i) when such shares are transferred in an
underwritten public offering, (ii) when such shares are transferred pursuant to
Rule 144 in compliance with the Securities Act or (iii) when such shares are
transferred in any other transaction if the seller delivers to the Company an
opinion of its counsel, which counsel and opinion shall be reasonably
satisfactory to the Company, or a "no-action" letter from the staff of the
Securities and Exchange Commission, in either case to the effect that such
legend is no longer necessary in order to protect the Company against a
violation by it of the Securities Act upon any sale or other disposition of such
shares without registration thereunder. Upon the consummation of any event
requiring the removal of a legend hereunder, the Company, upon the surrender of
certificates containing such legend, shall, at its own expense, deliver to the
holder of any such shares as to which the requirement for such legend shall have
terminated, one or more new certificates evidencing such shares not bearing such
legend.

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                                   ARTICLE II

               REPRESENTATIONS & WARRANTIES CONCERNING THE COMPANY

         The Company hereby represents and warrants to the Purchaser as follows
as of the date hereof and as of the Closing Date:

         2.1 Organization and Good Standing; Power and Authority;
Qualifications. The Company is a corporation duly organized, validly existing
and in good standing under the laws of the State of Delaware, and has all
requisite corporate power and authority to own, lease and operate its
properties, to carry on its business as presently conducted and as proposed to
be conducted. The Company has all requisite corporate power and authority to
enter and deliver this Agreement, to perform its obligations hereunder and carry
out the transactions contemplated by the Agreement.

         2.2 Authorization of the Agreement. The execution, delivery and
performance of the Agreement has been duly authorized by all requisite corporate
action on the part of the Company, including by a disinterested majority of the
board of directors of the Company in accordance with Section 144 of the Delaware
General Corporation Law, and the Agreement constitutes a legal, valid and
binding obligation of the Company, enforceable against the Company, in
accordance with its terms, except to the extent that enforceability may be
limited by bankruptcy, insolvency or other similar laws affecting creditors'
rights generally.

         2.3 No Conflict. The execution, delivery and performance by the Company
of the Agreement and the consummation by the Company of the transactions
contemplated hereby and thereby, and the issuance, sale and delivery by the
Company of the Securities will not (a) violate any provision of law, statute,
rule or regulation, or any ruling, writ, injunction, order, judgment or decree
of any court, administrative agency or other governmental body applicable to the
Company or any of its properties or assets, (b) conflict with or result in any
breach of any of the terms, conditions or provisions of, or constitute (with due
notice or lapse of time, or both) a default (or give rise to any right of
termination, cancellation or acceleration) under any agreement of the Company,
or result in the creation of any mortgage, lien, security interest, loan, charge
or encumbrance, upon any of the properties or assets of the Company, or (c)
violate the Certificate of Incorporation or the by-laws of the Company.

         2.4 Consents. No permit, authorization, consent or approval of or by,
or any notification of or filing (including any filing under the
Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended) with any
person (governmental or private) is required in connection with the execution
and delivery by the Company of the Agreement or any documentation relating
thereto, the consummation by the Company of the transactions contemplated hereby
or thereby, or the issuance, sale or delivery of the Securities.

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         2.5 Title to Shares. Upon delivery of the Securities as provided in
Section 1.4, the Securities will be duly authorized and validly issued and the
Purchaser will acquire good and valid title to the Securities free and clear of
any encumbrances and liens. The Securities shall be fully paid and
non-assessable and shall represent approximately 3.17% of the issued and
outstanding capital stock of the Company on a fully-diluted basis.

         2.6 Disclosure; Undisclosed Liabilities. This Agreement and each
certificate or other instrument, or document furnished by or on behalf of the
Company to the Purchaser and the filings and reports of the Company under the
Securities Act and the Securities Exchange Act of 1934 do not contain any untrue
statement of a material fact or omit to state a fact required to be stated
herein or therein or necessary to make the statements contained herein or
therein in light of the circumstances in which they were made not misleading.
The financial forecasts furnished by the Company to the Purchaser have been
reasonably prepared and reflect the best currently available estimates and
judgment of the Company's Management as to the expected future financial
performance of the Company and its subsidiaries. The Company has no liabilities
or obligations of any nature, whether known, unknown, absolute, accrued,
contingent or otherwise and whether due or to become due, except (i) as
disclosed in its filings under the Securities Act, and (ii) as could not
reasonably be expected to have a material adverse effect on the properties,
business, results of operations or earnings of the Company.

                                  ARTICLE III

              REPRESENTATIONS & WARRANTIES CONCERNING THE PURCHASER

         3.1 Representations and Warranties of the Purchaser. The Purchaser
represents and warrants to the Company as of the date hereof and as of the
Closing Date as follows:

                  (a) The Purchaser is acquiring the Securities for its own
account, for investment and not with a view to the distribution thereof within
the meaning of the Securities Act.

                  (b) The Purchaser understands that (i) the Securities have not
been registered under the Securities Act or any state securities laws, and (ii)
the Securities may not be sold unless such disposition is registered under the
Securities Act and applicable state securities laws or is exempt from
registration and/or regulation thereunder as the case may be.

                  (c) The Purchaser is an "Accredited Investor" (as defined in
Rule 501(a) under the Securities Act).

                  (d) The Purchaser is duly organized and validly existing under
the laws of the jurisdiction of its organization and has all power and authority
to enter into this Agreement.

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                  (e) The execution and delivery of this Agreement has been duly
authorized by all requisite corporate action on the part of the Purchaser, and
the Agreement constitutes a legal, valid and binding obligation of the
Purchaser, enforceable against the Purchaser, in accordance with its terms,
except to the extent that enforceability may be limited by bankruptcy,
insolvency or other similar laws affecting creditors' rights generally.

                  (f) The execution, delivery and performance by the Purchaser
of the Agreement and the consummation by the Purchaser of the transactions
contemplated thereby will not (a) violate any provision of law, statute, rule or
regulation, or any ruling, writ, injunction, order, judgment or decree of any
court, administrative agency or other governmental body applicable to the
Purchaser, or any of its properties or assets, or (b) violate the certificate of
incorporation or the bylaws of the Purchaser.

                                   ARTICLE IV

                                   CONDITIONS

         4.1 Conditions to Obligations of the Purchaser. The obligations of the
Purchaser to consummate the Purchase shall be subject to the fulfillment on or
prior to the Closing Date of each of the following conditions:

                  (a) No statute, rule or regulation or order of any court or
administrative agency shall be in effect which prohibits the consummation of the
transactions to be consummated at Closing;

                  (b) All requisite corporate proceedings and approvals of
Purchaser in connection with the consummation of the transactions contemplated
to be consummated at Closing shall have been obtained on or prior to the Closing
Date;

                  (c) Each of the representations and warranties of the Company
contained in this Agreement shall be true and correct as of the Closing (except
to the extent such representations and warranties are made as of a particular
date, in which case such representations and warranties shall have been true and
correct in all material respects of such date) and the Company shall have
delivered to the Purchaser a certificate, dated the Closing Date and signed by
the Company to the effect set forth in this Section 4.1(c);

                  (d) The Company in all material respects shall have performed,
satisfied and complied with each of its covenants and agreements set forth in
this Agreement to be performed, satisfied and complied with prior to or at
Closing;

                  (e) Purchaser and the Company shall have executed a mutually
acceptable registration rights agreement that shall grant the Purchaser the
opportunity to

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participate, in any future registration under the Securities Act of the
Company's equity securities, including without limitation any such registration,
resulting from the exercise by Penske Corporation or any of its affiliates of
its right to require registration of equity securities held by it, subject to
terms and conditions to be negotiated;

                  (f) Purchaser and the Company shall have executed a mutually
acceptable amendment of the Stockholders Agreement pursuant to which, among
other things, Purchaser shall have the right to (i) appoint one of the members
of the Board of Directors of the Company or, at Purchaser's sole discretion, a
non-voting observer to the Board of Director of the Company, and (ii) designate
one of the senior executives of the Company;

                  (g) the Purchaser and the Company shall have executed a
mutually acceptable collaboration agreement under which both parties shall carry
out joint evaluation for exploration of certain business opportunities within
the retail automobile industry;

                  (h) At Closing the Company shall have delivered to the
Purchaser all the certificates for the Securities as provided in Section 1.4;
and

                  (i) The Purchaser shall have received an opinion, addressed to
it, and dated the Closing Date, from counsel to the Company in form and
substance reasonably satisfactory to the Purchaser with respects to completion
of corporate action and enforceability.

         4.2 Conditions to Obligations of the Company. The obligation of the
Company to consummate the Purchase shall be subject to the satisfaction or
waiver at or prior to the Closing of each of the following conditions:

                  (a) Each of the representations and warranties of Purchaser
contained in this Agreement shall be true and correct as of Closing (except to
the extent such representations and warranties are made as of a particular date,
in which case such representations and warranties shall have been true and
correct in all material respects as of such date);

                  (b) Purchaser in all material respects shall have performed,
satisfied and complied with each of its covenants and agreements set forth in
this Agreement to be performed, satisfied and complied with prior to or at
Closing;

                  (c) Purchaser shall have executed an amendment to the
Stockholders Agreement, in a form mutually acceptable to the Company and the
Purchaser, which shall serve to add Purchaser as a party to the Stockholders
Agreement;

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                  (d) Purchaser shall have paid the Purchase Price in accordance
with Section 1.4;

                  (e) the Purchaser shall have delivered to the Company a
certificate dated the Closing Date and signed by the Purchaser to the effect
that the execution, delivery and performance of the Agreement has been duly
authorized by all requisite corporate action on the part of the Purchaser and
the Agreement constitutes a legal, valid and binding obligation of the
Purchaser, enforceable against the Purchaser, in accordance with its terms,
except to the extent that enforceability may be limited by bankruptcy,
insolvency or other similar laws affecting creditors' rights generally;

                  (f) Purchaser and the Company shall have executed a mutually
acceptable registration rights agreement that shall grant the Purchaser the
opportunity to participate, in any future registration under the Securities Act
of the Company's equity securities, including without limitation any such
registration, resulting from the exercise by Penske Corporation or any of its
affiliates of its right to require registration of equity securities held by it,
subject to terms and conditions to be negotiated;

                  (g) Purchaser and the Company shall have executed a mutually
acceptable amendment of the Stockholders Agreement pursuant to which, among
other things, Purchaser shall have the right to (i) appoint one of the members
of the Board of Directors of the Company, or, at Purchaser's sole discretion, a
non-voting observer to the Board of Directors of the Company, and (ii) designate
one of the senior executives of the Company; and

                  (h) the Purchaser and the Company shall have executed a
mutually acceptable collaboration agreement under which both parties shall carry
out joint evaluation for exploration of certain business opportunities within
the retail automobile industry.

                                   ARTICLE V

                                  TERMINATION

         5.1 Termination. This Agreement may be terminated at any time prior to
the Closing Date upon written notice of such termination by the terminating
party to the other party setting forth the basis for such termination:

                  (a) by mutual written consent of the Company and the
Purchaser; or

                  (b) by either the Purchaser or the Company if any of the
applicable conditions set forth in Article IV have not been satisfied or waived
as of the Closing Date; or

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                  (c) by the Purchaser if the requisite corporate approvals of
Purchaser have not been obtained;

                  (d) by either the Purchaser or the Company if a court of
competent jurisdiction or governmental, regulatory or administrative agency or
commission shall have issued a nonappealable final order, decree or ruling or
taken any other action having the effect of permanently restraining, enjoing or
otherwise prohibiting the transactions contemplated by this Agreement; or

                  (e) by the Purchaser or the Company, (i) if any representation
or warranty of the other set forth in this Agreement shall be untrue in any
material respect when made to the extent that such first party did not have
actual knowledge of such breach as of the date of this Agreement, or (ii) upon a
breach in any material respect of any covenant or agreement on the part of the
other set forth in this Agreement, in each case which would constitute a failure
of the condition to Closing of the first party.

         5.2 Effects of Termination. In the event of termination of this
Agreement pursuant to Section 5.1, this Agreement shall become void and have no
effect, without any liability to any person in respect hereof, except for any
liability resulting from such party's breach of this Agreement. Notwithstanding
anything to the contrary contained herein, Purchaser shall have no liability to
the Company or any other person in the event Purchaser terminates this Agreement
pursuant to Section 5.1(c).

         5.3 Survival of Representations. The representations and warranties
made in this Agreement shall survive for a period ending eighteen months after
Closing, provided that the representation and warranties of the Company set
forth in Section 2.5 shall survive without limitation.

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                                   ARTICLE VI

                                 MISCELLANEOUS

         6.1 Notices. Except as otherwise provided in this Agreement, all
notices, requests, consents and other communications hereunder to any party
shall be deemed to be sufficient if contained in a written instrument delivered
in person or by telecopy (with confirmation promptly sent by regular mail),
nationally recognized overnight courier or first class registered or certified
mail, return receipt requested, postage prepaid, addressed to such party at the
address set forth below or such other address as may hereafter be designated in
writing by such party to the other parties:

                           (i)      if to the Company, to:

                                    United Auto Group, Inc.
                                    13400 Outer Drive, West

                                    Suite B36
                                    Detroit, Michigan 48239-4001
                                    Attention:  General Counsel

                           (ii)     if to the Purchaser, to:

                                    Mitsui & Co., Ltd.
                                    First Motor Vehicles Div.
                                    2-1, Ohtemachi 1-chome, Chiyoda-ku
                                    Tokyo, Japan
                                    Attention: General Manager of First Motor
                                               Vehicles Div.

                                    with a copy to:

                                    Debevoise & Plimpton
                                    875 Third Avenue
                                    New York, New York 10022
                                    Attention: Christopher Smeall, Esq.

All such notices, requests, consents and other communications shall be deemed to
have been given when received.

         6.2 Amendments and Waivers. This Agreement may be amended, modified,
supplemented or waived only upon the written agreement of the party against whom
enforcement of such amendment, modification, supplement or waiver is sought.

         6.3 Successors and Assigns. This Agreement shall be binding upon and
inure to the benefit of and be enforceable by the parties hereto and their
respective successors and the personal representatives and assigns of the
parties hereto, whether so expressed or not.

         6.4 Entire Agreement. This Agreement (with the documents referred to
herein or delivered pursuant hereto and together with the Agreement) embodies
the entire agreement and understanding between the parties hereto and supersedes
all prior agreements and understandings relating to the subject matter hereof.

         6.5 Governing Law. This Agreement shall be construed and enforced in
accordance with and governed by the laws of the State of New York without giving
effect to the conflicts of law principles thereof which might result in the
application of the laws of any other jurisdiction.

         6.6 Submission to Jurisdiction. Each of the Company and the Purchaser
hereby (i) irrevocably submit to the jurisdiction of the courts of the State of
New York and the Federal courts of the United States of America located in the
State of New York

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solely in respect of the interpretation and enforcement of the provisions of
this Agreement, and in respect of the transactions contemplated hereby, and (ii)
agrees that service of any process, summons or notice by international courier
to the address set forth in Section 6.1 shall be effective service of process
for any action or proceeding brought against it in any such court.

         6.7 Counterparts. This Agreement may be executed in any number of
counterparts, each of which shall be an original, but all of which together
shall constitute one instrument. All signatures need not appear on any one
counterpart.

         6.8 Severability. Any term or provision of this Agreement which is
invalid or unenforceable in any jurisdiction shall, as to such jurisdiction, be
ineffective to the extent of such invalidity or unenforceability without
rendering invalid or unenforceable the remaining terms and provisions of this
Agreement or affecting the validity or enforceability of any of the terms or
provisions of this Agreement in any other jurisdiction.

         6.9 Specific Performance. The parties hereto acknowledge that there
would be no adequate remedy at law if any party fails to perform any of its
obligations hereunder, and accordingly agree that each party, in addition to any
other remedy to which it may be entitled at law or in equity, shall be entitled
to injunctive relief, including specific performance, to enforce such
obligations without the posting of any bond, and, if any action should be
brought in equity to enforce any of the provisions of this Agreement, none of
the parties hereto shall raise the defense that there is an adequate remedy at
law.

         6.10 Further Assurances. Each party hereto shall do and perform or
cause to be done and performed all such further acts and things and shall
execute and deliver all such other agreements, certificates, instruments, and
documents as any other party hereto reasonably may request in order to carry out
the intent and accomplish the purposes of this Agreement and the consummation of
the transactions contemplated hereby.

         6.11 Expenses. Each party to this Agreement shall bear its own cost and
expenses, including fees of consultant(s), accountant(s), counsel, and other
persons acting on behalf of or for such party.

                  [Remainder of Page Intentionally Left Blank]

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         IN WITNESS WHEREOF, the parties hereto have duly executed this
Agreement as of the date first above written.

                                        COMPANY:

                                        UNITED AUTO GROUP, INC.

                                        By:  /s/ Roger S. Penske
                                             --------------------------------
                                               Name:  Roger S. Penske
                                               Title: Chief Executive Officer

                                        PURCHASER:

                                        MITSUI & CO., LTD.

                                        By:  /s/ Motokazu Yoshida
                                             -------------------------------
                                               Name:  Motokazu Yoshida
                                               Title: Motor Vehicles, Marine
                                                      & Aerospace Group<PAGE>   1
                                                                 EXHIBIT 10.27.1

                          REGISTRATION RIGHTS AGREEMENT

                                      among

                             UNITED AUTO GROUP, INC.

                               MITSUI & CO., LTD.

                                       and

                           MITSUI & CO. (U.S.A.), INC.

                                   dated as of

                                February 28, 2001

<PAGE>   2

                  REGISTRATION RIGHTS AGREEMENT, dated as of February 28, 2001,
among United Auto Group, Inc., a Delaware corporation (the "Company"), Mitsui &
Co., Ltd., a Japanese company ("Mitsui Japan"), Mitsui & Co. (U.S.A.), Inc., a
New York corporation ("Mitsui USA" and together with Mitsui Japan, "Mitsui").

                  On January 31, 2001, the Company and Mitsui entered into a
Purchase Agreement (the "Purchase Agreement") pursuant to which, Mitsui agreed
to purchase at Closing (as described therein) 1,302,326 shares of voting common
stock par value 0.0001 per share of the Company subject to the terms and
conditions set forth therein.

                  If Mitsui desires to sell the shares of Common Stock, it may
be desirable to register such shares under the Securities Act (as defined
below).

                  As part of, and as consideration for, the acquisition of
shares of the Common Stock from the Company on the date hereof and from time to
time hereafter, the Company hereby grants to Mitsui certain registration and
other rights with respect to its shares of Common Stock.

                  Accordingly, the parties hereto agree as follows:

                  1. Definitions. As used herein, unless the context otherwise
requires, the following terms have the following respective meanings:

                  "Certificate of Incorporation" means the Certificate of
Incorporation of the Company, as it may be amended or restated from time to
time.

                  "Commission" means the Securities and Exchange Commission or
any other Federal agency at the time administering the Securities Act.

                  "Common Stock" means any shares of voting common stock, par
value $0.0001 per share, of the Company, now or hereafter authorized to be
issued, and, any and all securities of any kind whatsoever of the Company which
may be issued on or after the date hereof in respect of, in exchange for, or
upon conversion of shares of voting common stock pursuant to a merger,
consolidation, stock split, stock dividend, recapitalization of the Company or
otherwise.

                  "Exchange Act" means the Securities Exchange Act of 1934, as
amended, or any similar Federal statute, and the rules and regulations of the
Commission thereunder, all as the same shall be in effect at the time. Reference
to

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a particular section of the Exchange Act shall include a reference to the
comparable section, if any, of any such similar Federal statute.

                  "IMCG" means International Motor Cars Group I, L.L.C. and
International Motor Cars Group II, L.L.C.

                  "Penske" means Penske Automotive Holdings Corp.

                  "Penske Registrable Securities" refers collectively to the
"Registrable Securities" as defined in each of the Penske Registration Rights
Agreement.

                  "Penske Registration Rights Agreements" means the Registration
Rights Agreement, dated May 3, 1999, by and among the Company, International
Motor Cars Group I, L.L.C. and International Motor Cars Group II, L.L.C., as
amended from time to time, and the Registration Rights Agreement, dated December
22, 2000, by and between the Company and Penske Automotive Holdings Corp., as
amended from time to time, and any subsequent agreement between the Company and
Penske or Penske Corporation granting to Penske or Penske Corporation
registration rights with respect to Common Stock.

                  "Person" means a corporation, an association, a partnership,
an organization, a business, a trust, an individual, or any other entity or
organization, including a government or political subdivision or an
instrumentality or agency thereof.

                  "Registrable Securities" means (i) any shares of Common Stock
owned by Mitsui, (ii) any shares of Common Stock that Mitsui may acquire after
the date hereof, and (iii) any shares of Common Stock issued with respect to the
Common Stock referred to in clause (i) by way of a stock dividend, stock split
or reverse stock split or in connection with a combination of shares,
recapitalization, merger, consolidation or otherwise. As to any particular
Registrable Securities, such securities shall cease to be Registrable Securities
(a) when a registration statement with respect to the sale of such securities
shall have become effective under the Securities Act and such securities shall
have been disposed of in accordance with such registration statement, (b) when
such securities shall have been otherwise transferred, new certificates for them
not bearing a legend restricting further transfer shall have been delivered by
the Company and subsequent public distribution of them shall not require
registration of them under the Securities Act, or (c) when such securities shall
have been sold in compliance

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with Rule 144 of the Securities Act. Any certificate evidencing the Registrable
Securities shall bear a legend stating that the securities have not been
registered under the Securities Act and setting forth or referring to the
restrictions on transferability and sale of the securities.

                  "Registration Expenses" means all expenses incident to the
registration and disposition of the Registrable Securities pursuant to Section 2
hereof, including, without limitation, all registration, filing and applicable
national securities exchange fees, all fees and expenses of complying with state
securities or blue sky laws (including fees and disbursements of counsel to the
underwriters in connection with "blue sky" qualification of the Registrable
Securities and determination of their eligibility for investment under the laws
of the various jurisdictions), all word processing, duplicating and printing
expenses, all messenger and delivery expenses, the fees and disbursements of
counsel for the Company and of its independent public accountants, including the
expenses of "cold comfort" letters or any special audits required by, or
incident to, such registration, all fees and disbursements of underwriters
(other than underwriting discounts and commissions), all transfer taxes;
provided, however, that Registration Expenses shall exclude, and Mitsui shall
pay, underwriting discounts and commissions in respect of the Registrable
Securities being registered.

                  "Securities Act" means the Securities Act of 1933, as amended,
or any similar Federal statute, and the rules and regulations of the Commission
thereunder, all as the same shall be in effect at the time. References to a
particular section of the Securities Act shall include a reference to the
comparable section, if any, of any such similar Federal statute.

                  2.     Registration Under the Securities Act, etc.

                         2.1     Incidental Registration.

                                 (a) Right to Include Registrable Securities. If
Penske exercises its right to cause the Company to effect the registration under
the Securities Act of all or part of the Penske Registrable Securities, pursuant
to the Penske Registration Rights Agreements, and if as a result of exercising
such right the Company proposes to register any of the Penske Registrable
Securities under the Securities Act by registration on Form S-1, S-2 or S-3 or
any successor or similar form(s), the Company will each such time give prompt
written notice to Mitsui of its intention to register the Penske Registrable
Securities and of Mitsui's rights under this Section 2.1. Upon the written
request of Mitsui (which request

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shall specify the maximum number of Registrable Securities intended to be
disposed of by Mitsui), made as promptly as practicable and in any event within
30 days after the receipt of any such notice (15 days if the Company states in
such written notice or gives telephonic notice to Mitsui, with written
confirmation to follow promptly thereafter, stating that (i) such registration
will be on Form S-3 and (ii) such shorter period of time is required because of
a planned filing date), the Company shall include in such registration under the
Securities Act all Registrable Securities which the Company has been so
requested to register by Mitsui subject only to the terms and conditions set
forth herein. Notwithstanding anything to the contrary contained in this
Agreement, but subject in each case to the terms of each Penske Registration
Rights Agreement, the Company may in its discretion withdraw any registration
commenced pursuant to this Section 2.1 without liability to the holders of
Registrable Securities. The Company will pay all Registration Expenses in
connection with any registration of Registrable Securities requested pursuant to
this Section 2.1.

                                 (b) Right to Withdraw. Mitsui shall have the
right to withdraw its request for inclusion of its Registrable Securities in any
registration statement pursuant to this Section 2.1 at any time prior to the
execution of an underwriting agreement with respect thereto by giving written
notice to the Company of its request to withdraw.

                                 (c) Priority in Incidental Registrations. If
the managing underwriter of any underwritten offering shall inform the Company
by letter of its belief that the number of Registrable Securities requested to
be included in such registration, when added to the number of other securities
to be offered in such registration, would materially adversely affect such
offering, then, the Company shall include in such registration, to the extent of
the number and type of securities which the Company is so advised can be sold in
(or during the time of) such offering without so materially adversely affecting
such offering (the "Section 2.1 Sale Amount"), (i) all of the securities
proposed by the Company to be sold for its own account; (ii) to the extent not
included in (i) above, all of the Penske Registrable Securities proposed by each
of Penske or IMCG to be sold for its own account pursuant to its rights under
the Penske Registration Rights Agreements; (iii) thereafter, to the extent the
Section 2.1 Sale Amount is not exceeded, the Registrable Securities requested by
Mitsui to be included in such registration pursuant to Section 2.1(a), and (iv)
thereafter, to the extent the Section 2.1 Sale Amount is not exceeded, any other
securities of the Company requested to be included in such registration by any
other stockholder having the right to include securities in such registration.

                                       5
<PAGE>   6

                                 (d) The Company represents and warrants that,
as of the date hereof, no Person has rights to require the Company to effect the
registration under the Securities Act of Common Stock, except as disclosed prior
to the date hereof in the Company's filings with the U.S. Securities and
Exchange Commission.

                                 (e) After the date hereof, the Company shall
not grant to any Person, rights to require the Company to effect a registration
under the Securities Act of Common Stock unless the Company simultaneously
enters into an amendment of this Agreement pursuant to which Mitsui will be
granted rights to require the Company to effect a registration under the
Securities Act of Common Stock that are equal to the rights granted to such
Person.

                                 (f) After the date hereof, the Company shall
not grant to any Person rights to include Common Stock in a registration under
the Securities Act of Common Stock that are more favorable to such Person than
the rights granted to Mitsui hereunder unless the Company simultaneously enters
into an amendment of this Agreement pursuant to which Mitsui will be granted
rights to include Common Stock in a registration under the Securities Act that
are equal to the rights provided to such Person.

                         2.2     Registration Procedures. If and whenever the
Company is required to use its reasonable best efforts to effect the
registration of any Registrable Securities under the Securities Act as provided
in the Penske Registration Rights Agreements and if, in such event, Mitsui is
entitled to register Registrable Securities pursuant to this Agreement, the
Company shall, unless and until either Mitsui has withdrawn its request or is no
longer entitled to include in such registration, all or any portion of the
Registrable Securities, as expeditiously as possible:

                         (a) prepare and file with the Commission as soon as
                  practicable the requisite registration statement to effect
                  such registration (and shall include all financial statements
                  required by the Commission to be filed therewith) and
                  thereafter use its reasonable best efforts to cause such
                  registration statement to become effective; provided, however,
                  that before filing such registration statement (including all
                  exhibits) or any amendment or supplement thereto or comparable
                  statements under securities or blue sky laws of any
                  jurisdiction, the Company shall as promptly as practicable
                  furnish such documents to Mitsui and each underwriter, if any,
                  participating

                                       6
<PAGE>   7

                  in the offering of the Registrable Securities and their
                  respective counsel, which documents will be subject to the
                  reasonable review and comments of Mitsui, each underwriter and
                  their respective counsel; and provided, further, however, that
                  the Company may discontinue any registration of its securities
                  pursuant to Section 2.1 or which are not Registrable
                  Securities at any time prior to the effective date of the
                  registration statement relating thereto;

                         (b) notify Mitsui of the Commission's requests for
                  amending or supplementing the registration statement and the
                  prospectus, and prepare and file with the Commission such
                  amendments and supplements to such registration statement and
                  the prospectus used in connection therewith as may be
                  necessary to keep such registration statement effective and to
                  comply with the provisions of the Securities Act with respect
                  to the disposition of all Registrable Securities covered by
                  such registration statement for such period as shall be
                  required for the disposition of all of such Registrable
                  Securities in accordance with the intended method of
                  distribution thereof; provided, that except with respect to
                  any such registration statement filed pursuant to Rule 415
                  under the Securities Act, such period need not exceed 180
                  days;

                         (c) furnish, without charge, to Mitsui and each
                  underwriter such number of conformed copies of such
                  registration statement and of each such amendment and
                  supplement thereto (in each case including all exhibits), such
                  number of copies of the prospectus contained in such
                  registration statement (including each preliminary prospectus
                  and any summary prospectus) and any other prospectus filed
                  under Rule 424 under the Securities Act, in conformity with
                  the requirements of the Securities Act, and such other
                  documents, as Mitsui and such underwriters may reasonably
                  request;

                         (d) use its reasonable best efforts (i) to register or
                  qualify all Registrable Securities and other securities
                  covered by such registration statement under such securities
                  or blue sky laws of such States of the United States of
                  America where an exemption is not available and as Mitsui or
                  any managing underwriter shall reasonably request, (ii) to
                  keep such registration or qualification in effect for so long
                  as such registration statement remains in effect, and (iii) to
                  take any other action which may be reasonably necessary

                                       7
<PAGE>   8

                  or advisable to enable Mitsui to consummate the disposition in
                  such jurisdictions of the securities to be sold by Mitsui,
                  except that the Company shall not for any such purpose be
                  required to qualify generally to do business as a foreign
                  corporation in any jurisdiction wherein it would not but for
                  the requirements of this subsection (d) be obligated to be so
                  qualified or to consent to general service of process in any
                  such jurisdiction;

                         (e) furnish to Mitsui and each underwriter, if any,
                  participating in the offering of the securities covered by
                  such registration statement, a signed counterpart of (i) an
                  opinion of counsel for the Company, and (ii) a "comfort"
                  letter signed by the independent public accountants who have
                  certified the Company's or any other entity's financial
                  statements included or incorporated by reference in such
                  registration statement, covering substantially the same
                  matters with respect to such registration statement (and the
                  prospectus included therein) and, in the case of the
                  accountants' comfort letter, with respect to events subsequent
                  to the date of such financial statements, as are customarily
                  covered in opinions of issuer's counsel and in accountants'
                  comfort letters delivered to the underwriters in underwritten
                  public offerings of securities (and dated the dates such
                  opinions and comfort letters are customarily dated) and, in
                  the case of the legal opinion, such other legal matters, and,
                  in the case of the accountants' comfort letter, such other
                  financial matters, as the underwriters, may reasonably
                  request;

                         (f) promptly notify Mitsui and each managing
                  underwriter, if any, participating in the offering of the
                  securities covered by such registration statement (i) when
                  such registration statement, any pre-effective amendment, the
                  prospectus or any prospectus supplement related thereto or
                  post-effective amendment to such registration statement has
                  been filed, and, with respect to such registration statement
                  or any post-effective amendment, when the same has become
                  effective; (ii) of any request by the Commission for
                  amendments or supplements to such registration statement or
                  the prospectus related thereto or for additional information;
                  (iii) of the issuance by the Commission of any stop order
                  suspending the effectiveness of such registration statement or
                  the initiation of any proceedings for that purpose; (iv) of
                  the receipt by the Company of any notification with respect to
                  the suspension of the qualification of

                                       8
<PAGE>   9

                  any of the Registrable Securities for sale under the
                  securities or blue sky laws of any jurisdiction or the
                  initiation of any proceeding for such purpose; (v) at any time
                  when a prospectus relating thereto is required to be delivered
                  under the Securities Act, upon discovery that, or upon the
                  happening of any event as a result of which, the prospectus
                  included in such registration statement, as then in effect,
                  includes an untrue statement of a material fact or omits to
                  state any material fact required to be stated therein or
                  necessary to make the statements therein not misleading, in
                  the light of the circumstances under which they were made, and
                  in the case of this clause, and (vi), at the request of Mitsui
                  promptly prepare and furnish to Mitsui and each managing
                  underwriter, if any, participating in the offering of the
                  Registrable Securities, a reasonable number of copies of a
                  supplement to or an amendment of such prospectus as may be
                  necessary so that, as thereafter delivered to the purchasers
                  of such securities, such prospectus shall not include an
                  untrue statement of a material fact or omit to state a
                  material fact required to be stated therein or necessary to
                  make the statements therein not misleading in the light of the
                  circumstances under which they were made;

                         (g) otherwise comply with all applicable rules and
                  regulations of the Commission, and make available to its
                  security holders, as soon as reasonably practicable, an
                  earnings statement covering the period of at least twelve
                  months beginning with the first full calendar month after the
                  effective date of such registration statement, which earnings
                  statement shall satisfy the provisions of Section 11(a) of the
                  Securities Act and Rule 158 promulgated thereunder, and
                  promptly furnish to Mitsui a copy of any amendment or
                  supplement to such registration statement or prospectus;

                         (h) provide and cause to be maintained a transfer agent
                  and registrar (which, in each case, may be the Company) for
                  all Registrable Securities covered by such registration
                  statement from and after a date not later than the effective
                  date of such registration;

                         (i) (i) use its reasonable best efforts to cause all
                  Registrable Securities covered by such registration statement
                  to be listed on the principal securities exchange on which
                  similar securities issued by the Company are then listed (if
                  any), if the listing of such Registrable Securities is then
                  permitted under the rules of such

                                       9
<PAGE>   10

                  exchange, or (ii) if no similar securities are then so listed,
                  use its reasonable best efforts to (x) cause all such
                  Registrable Securities to be listed on a national securities
                  exchange or (y) failing that, secure designation of all such
                  Registrable Securities as a NASDAQ "national market system
                  security" within the meaning of Rule 11Aa2-1 of the Commission
                  or (z) failing that, to secure NASDAQ authorization for such
                  shares and, without limiting the generality of the foregoing,
                  to arrange for at least two market makers to register as such
                  with respect to such shares with the National Association of
                  Securities Dealers, Inc.;

                         (j) deliver promptly to counsel to Mitsui and each
                  underwriter, if any, participating in the offering of the
                  Registrable Securities, copies of all correspondence between
                  the Commission and the Company, its counsel or auditors;

                         (k) use its reasonable best efforts to obtain the
                  withdrawal of any order suspending the effectiveness of the
                  registration statement;

                         (l) provide a CUSIP number for all Registrable
                  Securities, no later than the effective date of the
                  registration statement; and

                         (m) make available its employees and personnel and
                  otherwise provide reasonable assistance to the underwriters
                  (taking into account the needs of the Company's business) in
                  their marketing of Registrable Securities.

         The Company may require Mitsui to furnish the Company such information
regarding Mitsui and the distribution of the Registrable Securities as the
Company may need for the purpose of effecting a registration of Common Stock,
including Registrable Securities, under the Securities Act. The Company shall be
excused from any obligation to Mitsui hereunder to the extent that Mitsui's
failure to deliver such information has impaired the Company's ability to
perform its obligations hereunder and comply with applicable laws and
regulations under the Securities Act, and for so long as Mitsui has not
delivered such information to the extent required by applicable law.

                                       10
<PAGE>   11
                  Mitsui agrees that upon receipt of any notice from the Company
of the happening of any event of the kind described in paragraph (f) (iii), (iv)
or (v) of this Section 2.2, Mitsui will, to the extent appropriate, discontinue
its disposition of Registrable Securities pursuant to the registration statement
relating to such Registrable Securities until, in the case of paragraph (f)(v)
of this Section 2.2, its receipt of the copies of the supplemented or amended
prospectus contemplated by paragraph (f)(v) of this Section 2.2 and, if so
directed by the Company, will deliver to the Company (at the Company's expense)
all copies, other than permanent file copies, then in its possession, of the
prospectus relating to such Registrable Securities current at the time of
receipt of such notice.

                         2.3     Incidental Underwritten Offerings. In the
case of a registration pursuant to Section 2.1 hereof, if the Company shall have
determined to enter into any underwriting agreements in connection therewith,
all of the Registrable Securities to be included in such registration shall be
subject to such underwriting agreements, and Mitsui shall be party to such
underwriting agreements in form and substance reasonably acceptable to it.

                         2.4     Indemnification.

                                 (a)     Indemnification by the Company. The
Company agrees that in the event of any registration of any securities of the
Company under the Securities Act, the Company shall indemnify and hold harmless
Mitsui, its respective directors, officers, members, partners, agents and
affiliates and each other Person who participates as an underwriter in the
offering or sale of such securities and each other Person, if any, who controls
Mitsui or any such underwriter within the meaning of the Securities Act, against
any losses, claims, damages, or liabilities, joint or several, to which Mitsui
or any such director, officer, member, partner, agent or affiliate or
underwriter or controlling person may become subject under the Securities Act or
otherwise, insofar as such losses, claims, damages or liabilities, joint or
several (or actions or proceedings, whether commenced or threatened, in respect
thereof), arise out of or are based upon (i) any untrue statement or alleged
untrue statement of any material fact contained in any registration statement
under which such securities were registered under the Securities Act, any
preliminary prospectus, final prospectus or summary prospectus contained
therein, or any amendment or supplement thereto or (ii) any omission or alleged
omission to state therein a material fact required to be stated therein or
necessary to make the statements therein in light of the circumstances in which
they were made not misleading, and the Company shall reimburse Mitsui and each
such director, officer, member, partner, agent or affiliate, underwriter and
controlling Person for any legal or any other expenses reasonably incurred by
them in connection with investigating or defending any such loss, claim,
liability,

                                       11
<PAGE>   12

action or proceeding; provided that the Company shall not be liable in any such
case to Mitsui or any such director, officer, member, partner, agent, affiliate,
or controlling person to the extent that any such loss, claim, damage, liability
(or action or proceeding in respect thereof) or expense arises out of or is
based upon an untrue statement or alleged untrue statement or omission or
alleged omission made in such registration statement, any such preliminary
prospectus, final prospectus, summary prospectus, amendment or supplement in
reliance upon and in conformity with written information furnished to the
Company by or on behalf of Mitsui, specifically stating that it is for use in
the preparation thereof; provided, however, that the foregoing indemnity
agreement with respect to any preliminary prospectus shall not inure to the
benefit of any person from whom the person asserting any such losses, claims,
damages or liabilities (the "Claimant") purchased securities, or any person
controlling such person, if a copy of the prospectus (as then amended or
supplemented if the Company shall have furnished any amendment or supplement
thereto) was not sent or given by or on behalf of such person to such Claimant,
if required by law to have been so delivered, at or prior to the written
confirmation of the sale of the securities sold to such Claimant, and if the
prospectus (as so amended and supplemented) would have cured the defect giving
rise to such losses, claims, damages or liabilities. Such indemnity shall remain
in full force regardless of any investigation made by or on behalf of Mitsui or
any such director, officer, member, partner, agent, affiliate, underwriter or
controlling Person and shall survive the transfer of such securities by Mitsui.

                                 (b)      Indemnification by Mitsui. As a
condition to including any Registrable Securities in any registration statement,
Mitsui shall indemnify and hold harmless (in the same manner and to the same
extent as set forth in paragraph (a) of this Section 2.4) the Company, and each
director of the Company, each officer of the Company and each other Person, if
any, who controls the Company within the meaning of the Securities Act, with
respect to any statement or alleged statement in or omission or alleged omission
from such registration statement, any preliminary prospectus, final prospectus
or summary prospectus contained therein, or any amendment or supplement thereto,
but only to the extent such statement or alleged statement or omission or
alleged omission was made in reliance upon and in conformity with written
information furnished to the Company by or on behalf of Mitsui specifically
stating that it is for use in the preparation of such registration statement,
preliminary prospectus, final prospectus, summary prospectus, amendment or
supplement; provided, however, that the liability of such indemnifying party
under this Section 2.4(b) shall be limited to the amount of proceeds (net of
expenses and underwriting discounts and

                                       12
<PAGE>   13

commissions) received by such indemnifying party in the offering giving rise to
such liability. Such indemnity shall remain in full force and effect, regardless
of any investigation made by or on behalf of the Company or any such director,
officer or controlling Person and shall survive the transfer of such securities
by Mitsui.

                                 (c)      Notices of Claims, etc. Promptly
after receipt by an indemnified party of notice of the commencement of any
action or proceeding involving a claim referred to in the preceding subsections
of this Section 2.4, such indemnified party shall, if a claim in respect thereof
is to be made against an indemnifying party, give written notice to the latter
of the commencement of such action or proceeding; provided, however, that the
failure of any indemnified party to give notice as provided herein shall not
relieve the indemnifying party of its obligations under the preceding
subsections of this Section 2.4, except to the extent that the indemnifying
party is actually prejudiced by such failure to give notice, and shall not
relieve the indemnifying party from any liability which it may have to the
indemnified party otherwise than under this Section 2.4. In case any such action
or proceeding is brought against an indemnified party, the indemnifying party
shall be entitled to participate therein and, unless in the opinion of outside
counsel to the indemnified party a conflict of interest between such indemnified
and indemnifying parties may exist in respect of such claim, to assume the
defense thereof, jointly with any other indemnifying party similarly notified to
the extent that it may wish, with counsel reasonably satisfactory to such
indemnified party; provided, however, that if the defendants in any such action
or proceeding include both the indemnified party and the indemnifying party and
if in the opinion of outside counsel to the indemnified party there may be legal
defenses available to such indemnified party and/or other indemnified parties
which are in conflict with or in addition to those available to the indemnifying
party, the indemnified party or parties shall have the right to select separate
counsel to defend such action or proceeding on behalf of such indemnified party
or parties, provided, however, that the indemnifying party shall be obligated to
pay for only one counsel and one local counsel for all indemnified parties.
After notice from the indemnifying party to such indemnified party of its
election so to assume the defense thereof and approval by the indemnified party
of such counsel, the indemnifying party shall not be liable to such indemnified
party for any legal expenses subsequently incurred by the latter in connection
with the defense thereof (unless the first provison in the preceding sentence
shall be applicable). No indemnifying party shall be liable for any settlement
of any action or proceeding effected without its written consent. No
indemnifying party shall, without the

                                       13
<PAGE>   14

consent of the indemnified party, consent to entry of any judgment or enter into
any settlement which does not include as an unconditional term thereof the
giving by the claimant or plaintiff to such indemnified party of a release from
all liability in respect to such claim or litigation.

                                 (d)      Contribution. If the indemnification
provided for in this Section 2.4 shall for any reason be held by a court to be
unavailable to an indemnified party under subsection (a) or (b) hereof in
respect of any loss, claim, damage or liability, or any action in respect
thereof, then, in lieu of the amount paid or payable under subsection (a) or (b)
hereof, the indemnified party and the indemnifying party under subsection (a) or
(b) hereof shall contribute to the aggregate losses, claims, damages and
liabilities (including legal or other expenses reasonably incurred in connection
with investigating the same), (i) in such proportion as is appropriate to
reflect the relative fault of the indemnifying party on the one hand, and the
indemnified party on the other, which resulted in such loss, claim, damage or
liability, or action in respect thereof, with respect to the statements or
omissions which resulted in such loss, claim, damage or liability, or action in
respect thereof, as well as any other relevant equitable considerations, or (ii)
if the allocation provided by clause (i) above is not permitted by applicable
law, in such proportion as shall be appropriate to reflect not only the relative
fault but also the relative benefits received by the indemnifying party and the
indemnified party from the offering of the securities covered by such
registration statement as well as any other relevant equitable considerations.
The parties hereto agree that it would not be just and equitable if
contributions pursuant to this Section 2.4(d) were to be determined by pro rata
allocation or by any other method of allocation which does not take into account
the equitable considerations referred to in the preceding sentence of this
Section 2.4(d). No Person guilty of fraudulent misrepresentation (within the
meaning of Section 11(f) of the Securities Act) shall be entitled to
contribution from any Person who was not guilty of such fraudulent
misrepresentation. In addition, no Person shall be obligated to contribute
hereunder any amounts in payment for any settlement of any action or claim
effected without such Person's consent, which consent shall not be unreasonably
withheld. Notwithstanding anything in this subsection (d) to the contrary, no
indemnifying party (other than the Company) shall be required to contribute any
amount in excess of the proceeds (net of expenses and underwriting discounts and
commissions) received by such party from the sale of the Registrable Securities
in the offering to which the losses, claims, damages or liabilities of the
indemnified parties relate.

                                       14
<PAGE>   15

                                 (e)      Other Indemnification. Indemnification
and contribution similar to that specified in the preceding subsections of this
Section 2.4 (with appropriate modifications) shall be given by the Company and
Mitsui with respect to any required registration or other qualification of
securities under any federal, state or blue sky law or regulation of any
governmental authority other than the Securities Act. The indemnification
agreements contained in this Section 2.4 shall be in addition to any other
rights to indemnification or contribution which any indemnified party may have
pursuant to law or contract and shall remain operative and in full force and
effect regardless of any investigation made by or on behalf of any indemnified
party and shall survive the transfer of any of the Registrable Securities by
Mitsui.

                                 (f)      Indemnification Payments. The
indemnification and contribution required by this Section 2.4 shall be made by
periodic payments of the amount thereof during the course of the investigation
or defense, as and when bills are received or expense, loss, damage or liability
is incurred.

                         2.5     Unlegended Certificates. In connection with the
offering of any Registrable Securities registered pursuant to this Section 2,
the Company shall promptly after the sale of such Registrable Securities (i)
facilitate the timely preparation and delivery to Mitsui and the underwriters,
if any, participating in such offering, of unlegended certificates representing
ownership of such Registrable Securities being sold in such denominations and
registered in such names as requested by Mitsui or such underwriters, and (ii)
instruct any transfer agent and registrar of such Registrable Securities to
release any stop transfer orders with respect to any such Registrable
Securities.

                         2.6     No Required Sale. Nothing in this Agreement
shall be deemed to create an independent obligation on the part of Mitsui to
sell any Registrable Securities pursuant to any effective registration
statement.

                  3. Rule 144. The Company shall take all actions reasonably
necessary to enable Mitsui to sell its Common Stock without registration under
the Securities Act within the limitation of the exemptions provided by (i) Rule
144 under the Securities Act, or (ii) any similar rule or regulation hereafter
adopted by the Commission including, without limiting the generality of the
foregoing, filing on a timely basis all reports required to be filed by the
Exchange Act. Upon the request of Mitsui, the Company will deliver to such
holder a written statement as to whether it has complied with such requirements.

                                       15
<PAGE>   16

                  4.     Amendments and Waivers. This Agreement may be amended,
modified or supplemented only by written agreement of the parties.

                  5.     Adjustments. In the event of any change in the
capitalization of the Company as a result of any stock split, stock dividend,
reverse split, combination, recapitalization, merger, consolidation, or
otherwise, the provisions of this Agreement shall be appropriately adjusted.

                  6.     Notices. Except as otherwise provided in this
Agreement, all notices, requests, consents and other communications hereunder to
any party shall be deemed to be sufficient if contained in a written instrument
delivered in person or by telecopy (with confirmation promptly sent by regular
mail), nationally recognized overnight courier or first class registered or
certified mail, return receipt requested, postage prepaid, addressed to such
party at the address set forth below or such other address as may hereafter be
designated in writing by such party to the other parties:

                (a)      If to Mitsui to:

                         Mitsui & Co., Ltd.
                         First Motor Vehicles Div.
                         2-1, Ohtemachi 1-chome, Chiyoda-ku
                         Tokyo, Japan
                         Attention: General Manager of First Motor Vehicles Div.

                         If to Mitsui USA:

                         Mitsui & Co. (U.S.A.), Inc.
                         200 Park Avenue
                         New York, New York  10166
                         Attention:  General Manager,
                                     Detroit Machinery & Automotive Department,
                                     Second Machinery Division

                         with a copy to:

                         Debevoise & Plimpton
                         875 Third Avenue
                         New York, N.Y.  10022
                         Attention:  Christopher Smeall, Esq.

                (b)      If to the Company, to it at:

                         United Auto Group
                         13400 Outer Drive West
                         Suite B36
                         Detroit, Michigan 48239-4001
                         Attention:  General Counsel

                                       16
<PAGE>   17
                  7.     Assignment; Third Party Beneficiaries; Majority
Controls. This Agreement shall be binding upon and inure to the benefit of and
be enforceable by the parties hereto and their respective successors and
permitted assigns. This Agreement may not be assigned by the Company, without
the prior written consent of Mitsui. Mitsui may, at its election, at any time or
from time to time, assign its rights under this Agreement, in whole or in part,
to any purchaser or other transferee of Registrable Securities held by it;
provided, however, that any rights to withdraw shares from inclusion in a
registration statement pursuant to Section 2 shall be made only by Mitsui for
itself and all such purchasers and transferees; and provided, further, that any
decision hereunder made by the holders of the majority of the Registrable
Securities shall be binding on all other holders of Registrable Securities.

                  8.     Remedies. The parties hereto agree that money damages
or other remedy at law would not be sufficient or adequate remedy for any breach
or violation of, or a default under, this Agreement by them and that, in
addition to all other remedies available to them, each of them shall be entitled
to an injunction restraining such breach, violation or default or threatened
breach, violation or default and to any other equitable relief, including
without limitation specific performance, without bond or other security being
required. In any action or proceeding brought to enforce any provision of this
Agreement (including the indemnification provisions thereof), the successful
party shall be entitled to recover reasonable attorneys' fees in addition to its
costs and expenses and any other available remedy.

                  9.     Descriptive Headings. The descriptive headings of the
several sections and paragraphs of this Agreement are inserted for reference
only and shall not control or otherwise affect the meaning hereof.

                                       17
<PAGE>   18

                  10.    Governing Law. This Agreement shall be construed and
enforced in accordance with, and the rights and obligations of the parties
hereto shall be governed by, the laws of the State of New York, without giving
effect to the conflicts of law principles thereof which might result in the
application of the laws of any other jurisdiction. Each of the parties hereto
hereby irrevocably consents to submit to the jurisdiction of the courts of the
State of New York and the United States of America located in the County of New
York solely in respect of the interpretation and enforcement of the provisions
of this Agreement, and in respect of the transactions contemplated hereby (and
agrees not to commence any action or proceeding relating thereto except in such
courts), and further agrees that service of any process, summons, notice or
document by U.S. registered mail to its respective address set forth in Section
6 hereof shall be effective service of process for any action or proceeding
brought against it in any such court. Each of the parties hereto hereby
irrevocably and unconditionally waives any objection to the laying of venue of
any action or proceeding arising out of this Agreement or the transactions
contemplated hereby in the courts of the State of New York or the United States
of America located in the County of New York, and hereby further irrevocably and
unconditionally waives and agrees not to plead or claim in any such court that
any such action or proceeding brought in any such court has been brought in an
inconvenient forum.

                  11.    Counterparts. This Agreement may be executed in any
number of counterparts, each of which shall be deemed an original, but all such
counterparts shall together constitute one and the same instrument.

                  12.    Invalidity of Provision. The invalidity or
unenforceability of any provision of this Agreement in any jurisdiction shall
not affect the validity or enforceability of the remainder of this Agreement in
that jurisdiction or the validity or enforceability of this Agreement, including
that provision, in any other jurisdiction. If any restriction or provision of
this Agreement is held unreasonable, unlawful or unenforceable in any respect,
such restriction or provision shall be interpreted, revised or applied in a
manner that renders it lawful and enforceable to the fullest extent possible
under law.

                  13.    Further Assurances. Each party hereto shall do and
perform or cause to be done and performed all further acts and things and shall
execute and deliver all other agreements, certificates, instruments, and
documents as any other party hereto reasonably may request in order to carry out
the intent and accomplish the purposes of this Agreement and the consummation of
the transactions contemplated hereby.

                                       18
<PAGE>   19

                  14.    Entire Agreement. This Agreement constitutes the entire
agreement, and supersedes all prior agreements and understandings, oral and
written, between the parties hereto with respect to the subject matter hereof.

                         [Remainder of page left blank]

                                       19
<PAGE>   20

                  IN WITNESS WHEREOF, the parties have caused this Agreement to
be executed and delivered by their respective officers thereunto duly
authorized.

                                          UNITED AUTO GROUP, INC.

                                          By:  /s/ Randall E. Seymore
                                               ---------------------------------
                                               Name:  Randall E. Seymore
                                               Title: Vice President

                                          MITSUI & CO., LTD.

                                          By:  /s/ Motokazu Yoshida
                                               --------------------------------
                                               Name:  Motokazu Yoshida
                                               Title: Motor Vehicles, Marine &
                                                      Aerospace Group

                                          MITSUI & CO. (U.S.A.), INC.

                                          By:  /s/ Shozaburo Maruyama
                                               ---------------------------------
                                               Name:  Shozaburo Maruyama
                                               Title: Senior Vice President

                                       20

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