Document:

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                                       APPROVED BY BOARD OF DIRECTORS ON 1/20/00

                                                              EXHIBIT 10.20

                              AMENDED AND RESTATED

                              COMERICA INCORPORATED

                  STOCK OPTION PLAN FOR NON-EMPLOYEE DIRECTORS

SECTION 1.  PURPOSE.

The purposes of this Stock Option Plan for Non-Employee Directors are to promote
the continued prosperity of Comerica Incorporated by aligning the long-term
financial interests of the recipients of options hereunder with those of the
shareholders of the Corporation, to provide an additional incentive for such
individuals to remain as directors, and to provide a means through which the
Corporation and its affiliates may attract well-qualified individuals to serve
as directors.

SECTION 2.  DEFINITIONS.

The following words and phrases, wherever capitalized, shall have the following
meanings respectively, unless the context otherwise requires:

A. "Affiliated Bank" means Comerica Bank-Illinois, Comerica Bank-California,
Comerica Bank & Trust, F.S.B., Comerica Bank-Texas or any other financial
institution which is or becomes a member of the controlled group of corporations
within the meaning of Section 1563(a)(1) of the Code (or other successor
provision of the Code defining the term "controlled group of corporations") of
which Comerica Incorporated is the common parent corporation.

B. "Agreement" means a written agreement which sets forth the terms and
conditions of an option grant under the Plan, including any amendment to such
written agreement. Agreements shall be subject to the express terms and
conditions set forth herein.

C. "Board" means the Board of Directors of Comerica Incorporated.

D. "Cause" means any act of (a) fraud or intentional misrepresentation, or (b)
embezzlement, misappropriation or conversion of assets or opportunities of the
Corporation or any Subsidiary.

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E. "Change in Control of the Corporation" shall be deemed to have occurred if
(A) any "person" (as such term is used in Sections 13(d) and 14(d) of the
Exchange Act), other than a trustee or other fiduciary holding securities under
an employee benefit plan of the Corporation, is or becomes the "beneficial
owner" (as defined in Rule 13d-3 under the Exchange Act), directly or
indirectly, of securities of the Corporation representing 26% or more of the
combined voting power of the Corporation's then outstanding securities; or (B)
during any period of two consecutive years, individuals who at the beginning of
such period constitute the Board and any new director (other than a director
designated by a person who has entered into an agreement with the Corporation to
effect a transaction described in clauses (A) or (C) of this subsection) whose
election by the Board or nomination for election by the stockholders of the
Corporation was approved by a vote of at least two-thirds (2/3) of the directors
then still in office who either were directors at the beginning of the period or
whose election or nomination for election was previously so approved, cease for
any reason to constitute a majority thereof; or (C) the shareholders of the
Corporation approve a merger or consolidation of the Corporation with any other
corporation, other than a merger or consolidation which would result in the
voting securities of the Corporation outstanding immediately prior thereto
continuing to represent (either by remaining outstanding or by being converted
into voting securities of the surviving entity) at least 75% of the combined
voting power of the voting securities of the Corporation or such surviving
entity outstanding immediately after such merger or consolidation, or the
shareholders of the Corporation approve a plan of complete liquidation of the
Corporation or an agreement for the sale or disposition of all or substantially
all of its assets.

F. "Code" means the Internal Revenue Code of 1986, as amended.

G. "Comerica Bank" means Comerica Bank, a Michigan banking corporation.

H. "Committee" means the Directors Committee. No member of the Committee shall
be eligible to receive discretionary Option grants under Section 5.B. of the
Plan.

I. "Common Stock" means shares of $5.00 par value common stock of Comerica
Incorporated, subject to adjustment pursuant to Section 7.

J. "Corporation" means Comerica Incorporated, a Delaware corporation.

K. "Disabled" or "Disability" means unable to engage in any substantial gainful
activity by reason of any medically determinable physical or mental impairment
which can be expected to result in death or to be of long-continued and
indefinite duration. An individual shall not be considered to be disabled unless
he furnishes proof of the existence thereof in such form as the Committee may
require.

L. "ERISA" means the Employee Retirement Income Security Act of 1974, as from
time to time amended.

M. "Exchange Act" means the Securities Exchange Act of 1934, as amended.

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N. "Exercise Price" means, with respect to each share of Common Stock subject to
an Option, the price at which such share may be purchased from the Corporation
pursuant to the exercise of such Option.

O. "Fair Market Value" means the closing price of the Common Stock on the New
York Stock Exchange as reported on the Composite Tape, or if it is not listed on
the New York Stock Exchange, the closing price on the exchange on which the
Common Stock is then listed, or if not listed on any exchange, then the closing
price reported on the NASDAQ National Market System over-the-counter market; if,
however, there is no trading of the Common Stock on the date in question, then
the closing price of the Common Stock, as so reported, on the last preceding
date on which there was trading shall instead be used to determine Fair Market
Value; if Fair Market Value for any date in question cannot be determined as
hereinabove provided, Fair Market Value shall be determined by the Committee by
whatever method or means the members, in the good faith exercise of their
discretion, at that time shall deem appropriate.

P. "Legal Representative" means the "guardian or legal representative" of the
optionholder as those terms are construed under the Exchange Act who, upon the
Disability or incapacity of an optionholder, shall have acquired on behalf of
the optionholder, by legal proceeding or otherwise, the right to exercise the
optionholder's rights and receive his or her benefits under the Plan.

Q. "Non-Employee Director" means (i) with respect to Section 5.A. of the Plan, a
member of the Board in his capacity as a director of the Corporation, provided
such individual is not an employee of the Corporation or of any Subsidiary of
the Corporation; and (ii) with respect to Section 5.B. of the Plan, a member of
the board of directors of Comerica Bank or any Affiliated Bank in such
individual's capacity as a director of Comerica Bank or any Affiliated Bank,
provided such individual also is a director of the Corporation and is not an
employee of the Corporation or of any Subsidiary of the Corporation.

R. "Option" means the right, granted pursuant to this Plan, of a holder to
purchase shares of Common Stock at the Exercise Price. All options granted under
the Plan shall be "nonstatutory stock options," i.e., options which do not
qualify under Sections 422 or 423 of the Code.

S. "Personal Representative" means the executor, administrator or personal
representative appointed to administer the optionholder's probate estate, or if
the individual has no probate estate, then the successor trustee(s) of any
revocable living trust the individual established during his or her lifetime.

T. "Plan" means the plan set forth herein which shall be known as the "Amended
and Restated Comerica Incorporated Stock Option Plan For Non-Employee
Directors."

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U. "Qualified Domestic Relations Order" means a "qualified domestic relations
order" as defined in the Code or in Title I of ERISA, or in rules promulgated
thereunder.

V. "Subsidiary" means any corporation of which a majority of the outstanding
voting capital stock is owned, directly or indirectly, by the Corporation. With
respect to non-corporate entities, it means any entity in which the Corporation
owns, directly or indirectly, a majority of the equity interest.

SECTION 3.  SHARES AVAILABLE UNDER THE PLAN.

The aggregate number of shares which may be issued and as to which grants of
Options may be made under the Plan is 375,000 shares(1) of the Common Stock,
subject to adjustment as set forth in Section 7. If any Option granted under the
Plan is canceled by mutual consent or terminates or expires for any reason
without having been exercised in full, the number of shares subject thereto
shall again be available for purposes of the Plan. The shares which may be
issued under the Plan may be either authorized but unissued shares or treasury
shares or partly each.

SECTION 4.  ADMINISTRATION OF THE PLAN.

The Plan shall be administered by the Directors Committee (the "Committee"). The
Committee may delegate the day-to-day administration of the Plan to any
individual or individuals it deems appropriate. The Committee shall keep records
of action taken at its meetings or by unanimous written consent. A majority of
the Committee shall constitute a quorum at any meeting, and the acts of a
majority of the members present at any meeting at which a quorum is present, or
acts approved in writing by all the members of the Committee, shall constitute
acts of the Committee.

Subject to the remaining provisions of this Section, the Committee shall have
full authority to carry out the provisions of the Plan, including authority to
interpret the Plan and prescribe such rules, regulations and procedures in
connection with the operation of the Plan as it shall deem to be necessary and
advisable for the administration of the Plan consistent with the purposes of the
Plan. All questions of interpretation and application of the Plan, or as to
Options granted under the Plan, shall be subject to the determination of the
Committee, which shall be final and binding.

With respect to Section 5.A. of the Plan, the selection of the Non-Employee
Directors to whom Options are to be granted, the timing of such grants, the
number of shares subject to any Option, the exercise price of any Option, the
periods during which any Option may be exercised and the term of any Option
shall be as set forth in those provisions hereof

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         (1) This number of shares reflects the 1998 "3 for 2" stock split.

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which relate to Section 5.A. of the Plan, and the Committee shall have no
discretion as to such matters.

With respect to Section 5.B. of the Plan, the Committee shall have exclusive
authority to grant Options under the Plan, to select the Non-Employee Directors
who will receive Options, to determine the number of Options to be granted to
any Non-Employee Director and the terms of any Option grant, and to determine
the time when any Options will be granted.

SECTION 5.  GRANT OF STOCK OPTIONS.

A. Automatic Annual Grants. On the day each annual meeting of the shareholders
of the Corporation is held, each Non-Employee Director shall automatically and
without further action by the Board or the Committee be granted an Option to
purchase 1,500 shares(2) of Common Stock, subject to adjustment and substitution
as set forth in Section 7. If the number of shares then remaining available for
the grant of Options under the Plan is not sufficient for each Non-Employee
Director to be granted an Option for 1,500 shares (or the number of adjusted or
substituted shares pursuant to Section 7), then each Non-Employee Director shall
be granted an Option for a number of whole shares equal to the number of shares
then remaining available divided by the number of Non-Employee Directors,
disregarding any fractions of a share.

B. Discretionary Grants. Any Non-Employee Director shall be eligible to receive
whatever number of Options the Committee, in its sole discretion, chooses to
grant to him or her from time to time, but shall not have a right to receive any
such grants.

SECTION 6.  TERMS AND CONDITIONS APPLICABLE TO OPTION GRANTS.

Options granted under the Plan shall be subject to the following terms and
conditions:

A. Exercise Price. The Exercise Price with respect to each share of Common Stock
covered by the Option shall be 100% of the Fair Market Value of such share on
the date the Option is granted.

B. Payment of Exercise Price. The Exercise Price for each Option shall be paid
in full upon exercise and shall be payable in cash (including check, bank draft
or money order); provided, however, that in lieu of cash, the individual
exercising the Option may pay the Exercise Price, in whole or in part, by
delivering to the Corporation shares of Common Stock having a Fair Market Value
on the date of exercise of the Option equal to the Exercise Price of the shares
being purchased: except that (i) any portion of the Exercise Price representing
a fraction of a share shall in any event be paid in cash, and (ii) no

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         (2) This number of shares reflects the 1998 "3 for 2" stock split.

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shares of Common Stock which have been held for less than six months may be
delivered in payment of the Exercise Price of an Option. Delivery of shares may
also be accomplished through the effective transfer to the Corporation of shares
held by a broker or other agent. The Corporation will also cooperate with any
individual exercising an Option who participates in a cashless exercise program
of a broker or other agent under which all or part of the shares received upon
exercise of the Option are sold through the broker or other agent or under which
the broker or other agent makes a loan to such individual. Notwithstanding the
foregoing, the exercise of the Option shall not be deemed to occur and no shares
of Common Stock will be issued by the Corporation upon exercise of the Option
until the Corporation has received payment of the Exercise Price in full. The
date of exercise of an Option shall be determined under procedures established
by the Committee, and as of the date of exercise the individual exercising the
Option shall be considered for all purposes to be the owner of the shares with
respect to which the Option has been exercised. Payment of the Exercise Price
with shares shall not increase the number of shares of Common Stock which may be
issued under the Plan as provided in Section 3.

C. Term of Options and Vesting. No Option shall be exercisable during the first
year of its term except as provided in Section 6.E., upon the occurrence of a
Change in Control of the Corporation, or as the Committee otherwise determines.
Each Option shall be exercisable with respect to all of the shares subject
thereto from and after the first anniversary of the date of its grant. Subject
to Section 6.E. which provides for earlier termination of an Option under
certain circumstances, each Option shall expire ten years after the date of
grant. An Option, to the extent exercisable at any time, may be exercised in
whole or in part.

Notwithstanding any other provision contained in the Plan, in case any Change in
Control of the Corporation occurs, all outstanding Options shall become
immediately and fully exercisable whether or not otherwise exercisable by their
terms.

D. Restrictions on Transferability. No Option shall be transferable by the
grantee otherwise than by will, or if the grantee dies intestate, by the laws of
descent and distribution of the state of domicile of the grantee at the time of
death or pursuant to a Qualified Domestic Relations Order. All Options shall be
exercisable during the lifetime of the grantee only by the grantee or by the
grantee's Legal Representative. These restrictions on transferability shall not
apply to the extent such restrictions are not at the time required for the Plan
to continue to meet the requirements of Rule 16b-3 under the Exchange Act, or
any successor Rule.

E. Separation From Board Service. If a grantee ceases to be a director of the
Corporation, Comerica Bank or any Affiliated Bank, any outstanding Options the
grantee then holds shall be exercisable in accordance with the following
provisions:

         1.(a) Retirement, Disability, or Other Separation. If the grantee's
         separation is due to his or her retirement, Disability, or any other
         circumstance not covered in

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         Sections 6.E.1.(b) or 6.E.2. below, any outstanding Option held by such
         grantee shall be exercisable by the grantee, or by his or her Legal
         Representative or Personal Representative, as the case may be (but only
         if exercisable by the grantee immediately prior to ceasing to be a
         director), at any time prior to the expiration date of such Option; and

         1.(b) Death. If the grantee's separation is due to his or her death,
         any outstanding Option held by such grantee shall be exercisable by the
         grantee, or by his or her Legal Representative or Personal
         Representative, as the case may be, at any time prior to the expiration
         date of such Option or within one year after the date the grantee
         ceases to be a director, whichever period is shorter; and

         2.    Resignation or Removal for Cause. If the grantee's separation is
         due to his or her resignation or removal from office for Cause, any
         outstanding Option held by the grantee which is exercisable by the
         grantee immediately prior to his or her resignation or removal shall be
         exercisable by the grantee for 90 days following such resignation or
         removal (or by his Personal Representative or Legal Representative
         during the remainder of such 90-day period if he or she dies or becomes
         Disabled during such period), but not beyond the original term of such
         Option.

An Option held by a grantee who has ceased to be a director of the Corporation,
Comerica Bank or any Affiliated Bank shall expire at the end of the applicable
exercise period, if any, specified in this Section 6.E.

F. Option Agreements. All grants of Options shall be evidenced by an Agreement
which shall be executed on behalf of the Corporation by a representative of the
Committee.

G. Conditions Applicable to Grants of Options. The obligation of the Corporation
to issue shares of Common Stock under the Plan shall be subject to (i) the
effectiveness of a registration statement under the Securities Act of 1933, as
amended, with respect to such shares, if deemed necessary or appropriate by
counsel for the Corporation; (ii) the condition that any shares to be issued
shall have been listed (or authorized for listing upon official notice of
issuance) upon each stock exchange, if any, on which the Common Stock may then
be listed; and (iii) all other applicable laws, regulations, rules and orders
which may then be in effect.

Subject to the foregoing provisions of this Section 6 and the other provisions
of the Plan, any Option granted under the Plan shall be subject to such
restrictions and other terms and conditions, if any, as shall be determined by
the Committee in its discretion and set forth in an Agreement; except that (i)
with respect to automatic grants under Section 5.A. hereof, in no event shall
the Committee or the Board have any power or authority which would cause the
Plan to fail to be a plan described in Rule 16b-3(c)(2) (ii) (or old Rule 16b-
3(b)(1)(iii) so long as such rule remains effective), or any successor Rule; and
(ii) with respect to discretionary grants under Section 5.B. hereof, in no event
shall any member

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of the Committee be other than a "disinterested person" under Rule
16b-3(c)(2)(i) (or Rule 16b-3(b)(1)(ii) so long as such rule remains effective).
Furthermore, transactions under this Plan are intended to comply with all
applicable conditions of Rule 16b-3 or its successors under the 1934 Act. To the
extent any provision of the Plan or action by the Committee fails to so comply,
it shall be deemed null and void, to the extent permitted by law and deemed
advisable by the Committee.

SECTION 7.  ADJUSTMENT AND SUBSTITUTION OF SHARES.

In the event any change occurs in the number of shares of Common Stock
outstanding as a result of any stock split, stock dividend, recapitalization,
merger, consolidation, reorganization, combination or exchange of shares,
split-up, split-off, spin off, liquidation or other similar change in
capitalization, or any distribution to common shareholders other than cash
dividends, the number or kind of shares that may be issued under the Plan
pursuant to Section 3, including shares covered by existing Options, shall be
automatically adjusted to preserve the proportionate interests of the grantees
in the Corporation as represented by their outstanding Options, and the
proportionality of the share pool under the Plan in relation to the total number
of shares outstanding.

If the outstanding shares of the Common Stock shall be changed into or become
exchangeable for a different number or kind of shares of stock or other
securities of the Corporation or another corporation, whether through
reorganization, reclassification, recapitalization, stock split-up, combination
of shares, merger or consolidation, then there shall be substituted for each
share of the Common Stock set forth in Section 3, including shares covered by
existing Options, the number and kind of shares of stock or other securities
into which each outstanding share of Common Stock shall be so changed or for
which each such share shall become exchangeable.

In case of any adjustment or substitution as provided for in the first two
paragraphs of this Section 7, the aggregate Exercise Price for all shares
subject to each then outstanding Option prior to such adjustment or substitution
shall be the aggregate Exercise Price for all shares of stock or other
securities (including any fraction) into which such shares shall have been
converted or which shall have been substituted for such shares. Any new Exercise
Price per share shall be carried to at least three decimal places with the last
decimal place rounded upwards to the nearest whole number.

If the outstanding shares of Common Stock shall be changed in value by reason of
any spin-off, split-off or split-up, or dividend in partial liquidation,
dividend in property other than cash or extraordinary distribution to holders of
Common Stock, the Committee shall make any adjustments to any then outstanding
Option which it determines are equitably required to prevent dilution or
enlargement of the rights of grantees which would otherwise result from any such
transaction.

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No adjustment or substitution provided for in this Section 7 shall require the
Corporation to issue or sell a fraction of a share or other security.
Accordingly, all fractional shares or other securities which result from any
such adjustment or substitution shall be eliminated and not carried forward to
any subsequent adjustment or substitution.

Except as provided in this Section 7, a grantee shall have no rights by reason
of the issuance by the Corporation of stock of any class or securities
convertible into stock of any class, any subdivision or consolidation of shares
of stock of any class, the payment of any stock dividend or any other increase
or decrease in the number of shares of stock of any class.

SECTION 8.  EFFECT OF THE PLAN ON THE RIGHTS OF THE CORPORATION, ITS AFFILIATES
            AND SHAREHOLDERS.

Nothing in the Plan, in any Option granted under the Plan, or in any Agreement
shall confer any right to any person to continue as a director of the
Corporation, Comerica Bank or any Affiliated Bank, or interfere in any way with
the rights of the shareholders of the Corporation, the Board or the board of
directors of Comerica Bank or any Affiliated Bank to elect and remove directors.

SECTION 9.  AMENDMENT AND TERMINATION.

The right to amend the Plan at any time and from time to time and the right to
terminate the Plan at any time are hereby specifically reserved to the Board;
provided, however, that no such termination shall result in the cancellation of
any outstanding Options theretofore granted under the Plan; and provided further
that no amendment of the Plan shall: (i) be made without shareholder approval if
shareholder approval of the amendment is at the time required for Options
granted under the Plan to directors of the Corporation, Comerica Bank or any
Affiliated Bank to qualify for the exemption from Section 16(b) of the Exchange
Act provided by Rule 16b-3, or by any successor Rule, or by the rules of any
stock exchange on which the Common Stock may then be listed; (ii) amend more
than once every six months the provisions of the Plan relating to grants under
Section 5.A. of the Plan including the selection of the directors to whom
Options are to be granted under Section 5.A., the timing of such grants, the
number of shares which will become subject to any Option granted under Section
5.A., the Exercise Price of any Option granted under Section 5.A., the periods
during which any Option granted under Section 5.A. may be exercised and the term
of any such Option other than to comport with changes in the Code or ERISA, or
the rules and regulations thereunder; or (iii) otherwise amend the Plan in any
manner that would cause Options granted under the Plan to directors of the
Corporation, Comerica Bank or any Affiliated Bank not to qualify for the
exemption provided by Rule 16b-3, or any successor Rule. No amendment or
termination of the Plan shall, without the written consent of the holder of an
Option theretofore granted under the Plan, adversely affect the rights of such
holder with respect thereto.

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Notwithstanding anything contained in the preceding paragraph or in any other
provision of the Plan or in any Agreement, the Board shall have the power to
amend the Plan in any manner deemed necessary or advisable so that Options
granted under the Plan qualify for the exemption provided by Rule 16b-3 (or any
successor rule relating to exemption from Section 16(b) of the 1934 Act), and
any such amendment shall, to the extent deemed necessary or advisable by the
Board, be applicable to any outstanding Options theretofore granted under the
Plan notwithstanding any contrary provisions in any Agreement. In the event of
any such amendment to the Plan, the holder of any Option outstanding under the
Plan shall, upon request of the Committee and as a condition to the
exercisability of such Option, execute a conforming amendment in the form
prescribed by the Committee to the Agreement referred to in Section 6.F. within
such reasonable time as the Committee shall specify in such request.

SECTION 10. EFFECTIVE DATE AND DURATION OF PLAN.

The Plan shall become effective upon approval by the affirmative votes of the
holders of a majority of the shares of Common Stock present, or represented, and
entitled to vote at a duly called and convened meeting of shareholders. If
approval is obtained at the Annual Meeting of Shareholders in 1995, the Plan
shall be effective on the date of the meeting and the first Options shall be
granted on that date following the meeting. The last Options to be granted under
the Plan shall be granted on the day of the Annual Meeting of Shareholders of
the Corporation in the year 2004.

                                      -10-<PAGE>   1
                                                                   EXHIBIT 10.21

                    COMERICA INCORPORATED 1999 DISCRETIONARY
                           DIRECTOR FEE DEFERRAL PLAN

<PAGE>   2

                              COMERICA INCORPORATED
                  1999 DISCRETIONARY DIRECTOR FEE DEFERRAL PLAN

                                TABLE OF CONTENTS

<TABLE>
<S>                                                                         <C>
SECTION I - PURPOSE............................................................1

SECTION II - DEFINITIONS.......................................................1

SECTION III - ELIGIBILITY......................................................2

SECTION IV - PROCEDURES RELATING TO DEFERRALS..................................2

SECTION V - CREDITING OF EARNINGS TO ACCOUNTS..................................4

SECTION VI - DISTRIBUTION OF DEFERRED FEES.....................................5

SECTION VII - DESIGNATION OF BENEFICIARY.......................................5

SECTION VIII - MISCELLANEOUS PROVISIONS........................................6

EXHIBIT A1 - NOTICE OF ELECTION TO DEFER....................................A1-1

EXHIBIT A2 - NOTICE OF ELECTION TO DEFER....................................A2-1

EXHIBIT B - NOTICE OF CANCELLATION OF DEFERRAL ELECTION......................B-1

EXHIBIT C - REALLOCATION OF INVESTMENT.......................................C-1

EXHIBIT D - BENEFICIARY DESIGNATION FORM.....................................D-1
</TABLE>

                                      -i-
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                              COMERICA INCORPORATED
                  1999 DISCRETIONARY DIRECTOR FEE DEFERRAL PLAN

SECTION I - PURPOSE

The purpose of this Plan is to allow an eligible director to defer compensation,
under the conditions provided herein, into a Mutual Fund Unit Account. The funds
in each eligible director's Mutual Fund Unit Account are hypothetically invested
in mutual funds designated by the Committee from time to time. No more than
one-half of the Director Fees of each Company director may be allocated, on the
director's behalf, into a Mutual Fund Unit Account. Any director of any
Subsidiary of the Company or an Advisory Board may defer all or a portion of his
or her Director Fees into a Mutual Fund Unit Account.

SECTION II - DEFINITIONS

The following words and phrases, wherever capitalized, shall have the following
meanings respectively:

         A. "Advisory Board" means a special board of directors appointed to
advise a Subsidiary of the Company.

         B. "Beneficiary(ies)" means such individual(s) or entity(ies)
designated on the most recent Beneficiary Designation the director has submitted
to the Corporate Secretary.

         C. "Beneficiary Designation" means a beneficiary designation on the
form attached hereto as Exhibit "C", as such form may be modified by the Plan
Administrator from time to time.

         D. "Cancellation of Deferral Election" means a written notice of
cancellation of election to defer unearned fees on the form attached hereto as
Exhibit "B", as such form may be modified by the Plan Administrator from time to
time.

         E. "Code" means the Internal Revenue Code of 1986, as amended.

         F. "Committee" means the Directors' Committee of the Board of
Directors of Comerica Incorporated.

         G. "Company" means Comerica Incorporated, a Delaware corporation.

         H. "Corporate Secretary" means the Secretary of Comerica Incorporated.

         I. "Deferral Election" means a written notice to defer the payment of
director fees on one of the applicable forms attached hereto as Exhibits "A1 or
A2", as such form may be modified by the Plan Administrator from time to time.

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         J. "Director Fees" means a director's annual retainer, fees for
attending board meetings, fees for attending meetings of any committee of the
board, if any, and fees for serving as chairman of any committee of the board.

         K. "Mutual Fund Unit Account" means an account established under
Section V of this Plan in the name of each director to record those fees that
have been deferred to such account and earnings thereon.

         L. "Participant" means an eligible director for whom a Mutual Fund Unit
Account is maintained under the Plan.

         M. "Plan" means the Comerica Incorporated 1999 Discretionary Director
Fee Deferral Plan," the provisions of which are set forth herein, as it may be
amended from time to time.

         N. "Plan Administrator" means one or more individuals appointed by the
Committee to handle the day-to-day administration of the Plan.

         O. "Reallocation Form" means a written notice to reallocate a deferred
Director Fees on the form attached hereto as Exhibit C, as such form may be
modified by the Plan Administrator from time to time.

         P. "Subsidiary" means any corporation, partnership or other entity, a
majority of whose stock or interests is owned by Comerica Incorporated.

         Q. "Unforeseeable Emergency" means a severe financial hardship to the
Participant resulting from a sudden and unexpected illness or accident of the
Participant or of a dependent (within the meaning of Code Section 152(a)) of the
Participant, loss of the Participant's property due to casualty, or other
similar extraordinary and unforeseeable circumstances arising as a result of
events beyond the control of the Participant.

SECTION III - ELIGIBILITY

Each director of the Company, each director of any Subsidiary of the Company and
each director of an Advisory Board of a Subsidiary of the Company shall be
eligible to participate in the Plan provided any such director is not an
employee of the Company or an employee of any Subsidiary of the Company.

SECTION IV - PROCEDURES RELATING TO DEFERRALS

         A.    Deferral of Directors Compensation.

               1. Deferral for Directors of the Company. No more than one-half
of the Director Fees of each of the Company's directors shall be subject to a
Deferral Election (other than length of deferral and schedule of pay-out) under
this Plan. The remainder of the Directors' Fees of each Company director shall
be deferred automatically as provided in the Comerica Incorporated 1999 Common
Stock Director Fee Deferral Plan. The minimum period of deferral for Director
Fees deferred pursuant to this Section IV (A) shall be the lesser of the

                                      -2-

<PAGE>   5

number of years remaining before regular retirement or five years. In the event
a Company director does not indicate the period of deferral for such fees on the
Deferral Election, such fees shall be deferred for a period of five years and
paid out in a single lump sum.

               2. Deferral for Directors of any Subsidiary. Directors of any
Subsidiary of the Company may defer any portion of their compensation under this
Plan or the Comerica Incorporated 1999 Common Stock Director Fee Deferral Plan.
The minimum period of deferral for Director Fees deferred pursuant to this
Section IV (A) shall be the lesser of the number of years remaining before
regular retirement or five years. In the event a director of any Subsidiary of
the Company does not indicate the period of deferral, such fees shall be
deferred for a period of five years and paid out in a single lump sum.

               3. Deferral for Directors of any Advisory Board. Directors of an
Advisory Board of any Subsidiary of the Company may defer any portion of their
compensation under this Plan or the Comerica Incorporated 1999 Common Stock
Director Fee Deferral Plan. The minimum period of deferral for Director Fees
deferred pursuant to this Section IV (A) shall be the lesser of the number of
years remaining before regular retirement or five years. In the event a director
of an Advisory Board of any Subsidiary of the Company does not indicate the
period of deferral, such fees shall be deferred for a period of five years and
paid out in a single lump sum.

         B. Elective Deferral Procedures. Any eligible director wishing to defer
Director Fees which are subject to a Deferral Election must submit a Deferral
Election to the Corporate Secretary at 500 Woodward, MC 3391, Detroit, Michigan
48226-3391 or such other person designated by the Chief Executive Officer of the
Company from time to time, prior to the beginning of the service year during
which the fees are to be earned (from annual meeting of shareholders to annual
meeting of shareholders). However, any newly-appointed or newly-elected director
may submit a Deferral Election within sixty days of his or her appointment or
election. A Deferral Election pursuant to this Plan may cover all or a portion
of Director Fees which may be deferred pursuant to this Plan but shall not cover
amounts subject to an automatic allocation pursuant to the Comerica Incorporated
1999 Common Stock Director Fee Deferral Plan, and shall designate in which
mutual fund and in what proportions the Director Fees under this Plan so
deferred will be recorded.

        1.    Irrevocability. A director may not modify or revoke a Deferral
              Election (except to the extent permitted to reallocate among
              investment options), once the director has performed the services
              that entitle the director to the fees. If a director has submitted
              a Deferral Election relating to fees to be earned in the future,
              he or she may modify such election by submitting a new Deferral
              Election prior to the beginning of the calendar year in which the
              fees will be earned. Any such Deferral Election will supersede any
              previous Deferral Election as it relates to fees to be earned in
              future years.

        2.    Cancellation. A Deferral Election may be canceled by submitting a
              Cancellation of Deferral Election in form and substance as
              provided in Exhibit B attached hereto, as such form may be
              modified by the Plan Administrator from time to time. A director
              who cancels a Deferral Election may not submit a new Deferral
              Election

                                      -3-

<PAGE>   6

               before at least twelve months have elapsed from the effective
               date of the cancellation.

SECTION V - CREDITING OF EARNINGS TO ACCOUNTS

Director Fees which have been deferred under this Plan shall be credited to
Mutual Fund Unit Accounts created by and recorded on the books of the Company
from time to time. As of the last day of each month or on a more frequent basis
if practicable, each Mutual Fund Unit Account shall be adjusted as follows:

         A. Mutual Fund Unit Account shall be "hypothetically invested" in one
of the mutual funds offered for investment by the Committee and designated by
each director. In the event the sponsor of said mutual fund ("Sponsor") has
established a rabbi trust for its own benefit to fund the Sponsor's obligations
under this Plan, the purchase price for the mutual fund shares shall be the
actual price of the shares the Sponsor purchases on the open market on the day
of the deferral of the Director Fees. In the event that the Sponsor has not
established a rabbi trust, the purchase price shall be based upon the closing
price for the mutual fund shares on the exchange of which the mutual fund is
listed on the day that the Director Fees would have otherwise been paid to the
director had they not been deferred. No director shall have any right to vote
any shares of the Sponsor's mutual funds held in the rabbi trust except to the
extent otherwise permitted by the terms of the rabbi trust.

         1.    The account shall first be charged with any distributions made
               during the month or on a more frequent basis if practicable;

         2.    The account shall then be credited with earnings, gains and
               losses for the month based upon the closing price for the
               designated mutual fund on the exchange of which said fund is
               listed as of the last day of such month or on a more frequent
               basis if practicable, plus any dividends paid during such period.

         3.    The account shall then be credited with the amount, if any, of
               Director Fees deferred and designated to be credited to such
               account during such month or on a more frequent basis if
               practicable.

         B. Reallocation of Investment Options. Each director may reallocate all
or a portion of his or her Mutual Fund Unit Account to change the percentage(s)
of an investment and/or designate an alternate mutual fund as an investment
option by submitting a Reallocation Form in form and substance as provided in
Exhibit "C" to the Corporate Secretary or such other person designated by the
Chief Executive Officer of the Company from time to time. The Plan Administrator
may delay any reallocation request because of a trading blackout period or any
other trading restriction which may be imposed on the Company, whether voluntary
or involuntary. No transfers between investment options will be allowed if
prohibited by the rules applicable to the particular mutual fund from or to
which a transfer is to be made or by rules adopted by the Plan Administrator and
communicated to the directors.

                                       -4-

<PAGE>   7

SECTION VI - DISTRIBUTION OF DEFERRED FEES

         A. Time and Manner. Distribution of each Participant's account shall be
made in cash at such time and in such manner, i.e., a lump sum or installments,
as the Participant has specified in the Deferral Election(s) submitted to the
Corporate Secretary or as otherwise required by Section IV(A).

         B. Installment Payments. Installment payments under an installment
payment option may not exceed ten years. The amount of each installment payment
shall be determined by multiplying the balance of the Mutual Fund Unit Account
on the date the installment is scheduled to be paid by a fraction, the numerator
of which is one and the denominator of which is the number of unpaid
installments remaining at such time. If a Participant who is receiving
installment payments dies prior to receiving the balance of his or her account,
the unpaid balance shall be paid in one lump sum to the Participant's
Beneficiary(ies) not later than the 15th day of the month following the month in
which the Participant's death occurred.

         C. Hardship Distributions. In the event of an Unforeseeable Emergency
involving a Participant which occurs prior to distribution of the entire balance
of the Participant's Mutual Fund Unit Account, the Committee may, in its sole
discretion, distribute to the Participant in a single sum an amount equal to
such portion of such account as shall be necessary, in the judgment of the
Committee, to alleviate the financial hardship occasioned by the Unforeseeable
Emergency. Any Participant desiring a distribution under the Plan on account of
an Unforeseeable Emergency shall submit to the Committee a written request for
such distribution which sets forth in reasonable detail the Unforeseeable
Emergency which would cause the Participant severe financial hardship, and the
amount which the Participant believes to be necessary to alleviate the financial
hardship. In determining whether to grant any requested hardship distribution,
the Committee shall adhere to the requirements of Section 1.457-2(h)(4) of the
Income Tax Regulations (or to any successor regulations dealing with the same
subject matter), the provisions of which are incorporated herein by reference.

         D. Cash Out Distributions. If, at the time an installment distribution
of a Mutual Fund Unit Account in the name of any Participant is scheduled to
commence, the fair market value of such account does not exceed $10,000, then,
notwithstanding an election by the Participant that such account be distributed
in installments, the balance of such account shall be distributed to the
Participant in a single sum on or about the date the first installment is
scheduled to be made.

SECTION VII - DESIGNATION OF BENEFICIARY

Upon becoming a Participant of the Plan, each director shall submit to the
Corporate Secretary or such other person designated by the Chief Executive
Officer of the Company from time to time a Beneficiary Designation on the form
attached as Exhibit "D" designating one or more Beneficiaries to whom payments
otherwise due the Participant shall be made in the event of the Participant's
death before distribution of the Participant's Mutual Fund Unit Account has been
completed. A Beneficiary Designation will be effective only if it is signed by
the Participant and submitted to the Corporate Secretary before the
Participant's death.

                                       -5-

<PAGE>   8

Any Beneficiary Designation submitted to the Corporate Secretary will supersede
any previous Beneficiary Designation so submitted. If the primary beneficiary
shall predecease the Participant or the primary beneficiary and the Participant
die in a common disaster under such circumstances that it is impossible to
determine who survived the other, amounts remaining unpaid at the time of the
Participant's death shall be paid to the alternate beneficiary(ies) who survive
the Participant. If there are no alternate beneficiaries living or in existence
at the date of the Participant's death, the balance of the account shall be paid
in one lump sum to the legal representative of the Participant's estate.

SECTION VIII - MISCELLANEOUS PROVISIONS

         A. Nonalienation of Benefits. Neither the Participant nor any
Beneficiary designated by him or her shall have any right to alienate, assign,
or encumber any amount that is or may be payable hereunder, nor may any such
amount be subject to attachment, garnishment, levy, execution or other legal or
equitable process for the debts, contracts, liabilities, engagements or acts of
any Participant or Beneficiary.

         B. Administration of Plan. Full power and authority to construe,
interpret, and administer the Plan shall be vested in the Directors' Committee
of the Board of Directors of the Company. To the extent permitted by law, the
Committee may delegate any authority it possesses to the Plan Administrator. To
the extent the Committee has delegated authority concerning a matter to the Plan
Administrator, any reference in the Plan to the "Committee" insofar as it
pertains to such matter, shall refer likewise to the Plan Administrator.
Decisions of the Committee shall be final, conclusive, and binding upon all
parties.

         C. Amendment or Termination. The Board of Directors of the Company may
amend or terminate this Plan at any time. Any amendment or termination of this
Plan shall not affect the rights of Participants or Beneficiaries to the amounts
in the Mutual Fund Unit Account of such amendment or termination. The Plan
Administrator may make any amendments to the Plan, including forms under the
Plan, recommended by the Company's legal counsel which are necessary or
appropriate to keep the Plan and forms in compliance with applicable laws. The
Company reserves the right to accelerate distribution of fees deferred hereunder
in the event the Plan is terminated.

         D. Effective Date. This Plan is intended to constitute an amendment and
restatement of a prior plan maintained by the Company captioned "Comerica
Incorporated Director Fee Deferral Plan". The Plan was approved by the Board of
Directors of Company on May 21, 1999. The version of the Plan contained in this
document shall be effective to defer monies to be earned from and after January
1, 1997, and the earnings rate contained in this version of the Plan shall apply
to existing accounts under the Plan beginning January 1, 1997. Except for the
earnings rate, monies deferred under prior versions of the Plan shall remain
subject to prior deferral elections.

         E. Statements to Participants. Statements will be provided to
Participants under the Plan on at least an annual basis.

                                       -6-

<PAGE>   9

         F. Nonforfeitability of Participant Accounts. Each Participant shall be
fully vested in his or her Mutual Fund Unit Account created by Company from time
to time.

         G. Successors Bound. The contractual agreement between Comerica
Incorporated and each Participant resulting from the execution of a Deferral
Election shall be binding upon and inure to the benefit of Comerica
Incorporated, its successors and assigns, and to the Participant and to the
Participant's heirs, executors, administrators and other legal representatives.

         H. Governing Law and Rules of Construction. This Plan shall be governed
in all respects, whether as to construction, validity or otherwise, by
applicable federal law and, to the extent that federal law is inapplicable, by
the laws of the State of Michigan. Each provision of this Plan shall be treated
as severable, to the end that, if any one or more provisions shall be adjudged
or declared illegal, invalid or unenforceable, this Plan shall be interpreted,
and shall remain in full force and effect, as though such provision or
provisions had never been contained herein. It is the intention of Comerica
Incorporated that the Plan established hereunder be "unfunded" for income tax
purposes, whether or not the Company establishes a rabbi trust, and the
provisions hereof shall be construed in a manner to carry out that intention.

         I. Ownership of Fee Deferrals. Title to and beneficial ownership of any
assets, of whatever nature, which may be allocated by Comerica Incorporated to
any Mutual Fund Unit Account in the name of any Participant shall at all times
remain with Comerica Incorporated, and no Participant or Beneficiary shall have
any property interest whatsoever in any specific assets of Comerica Incorporated
by reason of the establishment of the Plan. The rights of each Participant and
Beneficiary hereunder shall be limited to enforcing the unfunded, unsecured
promise of Comerica Incorporated to pay benefits under the Plan, and the status
of any Participant or Beneficiary shall be that of an unsecured general creditor
of Comerica Incorporated.

                                       -7-

<PAGE>   10

                                                                    EXHIBIT "A1"

                              COMERICA INCORPORATED
                           DIRECTOR FEE DEFERRAL PLANS

               FORM APPLICABLE TO COMERICA INCORPORATED DIRECTORS

                         NOTICE OF ELECTION TO DEFER AND
                    DISTRIBUTION OF DEFERRED DIRECTORS' FEES

A DIRECTOR WHO WISHES TO DEFER FEES PURSUANT TO THE COMERICA INCORPORATED 1999
COMMON STOCK DIRECTOR FEE DEFERRAL PLAN OR COMERICA INCORPORATED 1999
DISCRETIONARY DIRECTOR FEE DEFERRAL PLAN (COLLECTIVELY CALLED "PLANS") SHOULD
CHECK APPLICABLE BOXES,
SIGN AND DATE THE FORM AND RETURN IT TO:

                                ALBERT P. TAYLOR
                              COMERICA INCORPORATED
                                500 WOODWARD AVE
                               31ST FLOOR, MC 3382
                          DETROIT, MICHIGAN 48226-3382

A.        I SERVE AS DIRECTOR ON THE COMERICA INCORPORATED BOARD.

B.        ELECTION TO DEFER FEES. PURSUANT TO PROVISIONS OF THE ABOVE REFERENCED
PLANS, I HEREBY ELECT TO HAVE THE FEES WHICH ARE PAYABLE TO ME FOR RENDERING
SERVICES AS A MEMBER OF THE BOARD OF DIRECTORS OF COMERICA INCORPORATED DEFERRED
IN THE MANNER SPECIFIED BELOW. I UNDERSTAND THAT AT LEAST ONE-HALF OF MY
DIRECTOR FEES SHALL BE DEFERRED INTO THE COMERICA COMMON STOCK FUND. I
UNDERSTAND AND AGREE THAT THIS ELECTION SHALL BECOME EFFECTIVE ON THE DATE OF
THE ANNUAL MEETING OF SHAREHOLDERS IMMEDIATELY FOLLOWING RECEIPT OF THIS NOTICE
OF ELECTION BY THE OFFICE OF THE CHAIRMAN OF COMERICA INCORPORATED OR ON THE
FIRST DAY OF THE MONTH FOLLOWING RECEIPT BY SUCH IF I AM A NEWLY ELECTED
DIRECTOR OF COMERICA INCORPORATED. I UNDERSTAND THAT THIS ELECTION SHALL BE
IRREVOCABLE WITH RESPECT TO FEES ONCE I HAVE PERFORMED THE SERVICES WHICH
ENTITLE ME TO RECEIVE SUCH FEES. THIS ELECTION SHALL CONTINUE IN EFFECT UNTIL I
MODIFY OR REVOKE IT.

C.       PERCENTAGE OF FEES TO BE DEFERRED:

MANDATORY                           50%     COMERICA COMMON STOCK FUND

                                      A1-1

<PAGE>   11

DISCRETIONARY
(SELECT UP TO 50%)
                           ____     COMERICA COMMON STOCK FUND

                           ____     MUNDER INDEX 500 FUND

                           ____     MUNDER BOND FUND

                           ____     MUNDER SHORT TERM BOND FUND

                           ____     MUNDER SMALL COMPANY GROWTH FUND

                           ____     MUNDER CASH INVESTMENT FUND

D.       YEAR DISTRIBUTION OF DEFERRED FEES IS TO COMMENCE (MUST BE A MINIMUM OF
         5 YEARS, EXCEPT IN THE CASE OF RETIREMENT, IN WHICH CASE PAYMENTS MAY
         BEGIN IN THE YEAR OF RETIREMENT): 20__

PAYMENTS WILL BE MADE OR COMMENCE ON MAY 30TH OF THE YEAR SELECTED.

E.       PAYMENT METHOD DESIRED:

         ___   LUMP SUM

         ___   INSTALLMENTS OVER _____ YEARS (YOU MAY CHOOSE 2, 5 OR 10 YEARS).
               (THE BALANCE OF ANY FEE DEFERRAL ACCOUNT WILL BE DISTRIBUTED IN
               ONE LUMP SUM TO THE DIRECTOR'S DESIGNATED BENEFICIARY IF THE
               DIRECTOR DIES BEFORE RECEIPT OF ALL INSTALLMENT PAYMENTS).

         FREQUENCY OF INSTALLMENTS:

         ___   ANNUALLY

         ___   EVERY 3 MONTHS

DATE:    MAY 21, 1999                                __________________________
         ------------
                                                     SIGNATURE OF DIRECTOR

Name           _______________________________

Address        _______________________________

               _______________________________

Social Security # __________________________

                                      A1-2

<PAGE>   12

                                                                    EXHIBIT "A2"

                              COMERICA INCORPORATED
                           DIRECTOR FEE DEFERRAL PLANS

                  FORM APPLICABLE TO BANK OR ADVISORY DIRECTORS

                         NOTICE OF ELECTION TO DEFER AND
                    DISTRIBUTION OF DEFERRED DIRECTORS' FEES

A DIRECTOR WHO WISHES TO DEFER FEES PURSUANT TO THE TERMS OF THE COMERICA
INCORPORATED 1999 COMMON STOCK DIRECTOR FEE DEFERRAL PLAN OR THE COMERICA
INCORPORATED 1999 DISCRETIONARY DIRECTOR FEE DEFERRAL PLAN (COLLECTIVELY CALLED
"PLANS") SHOULD CHECK APPLICABLE BOXES, COMPLETE THE OTHER PORTIONS OF THE FORM,
SIGN AND DATE THE FORM AND RETURN IT TO:

                                ALBERT P. TAYLOR
                              COMERICA INCORPORATED
                                500 WOODWARD AVE
                               31ST FLOOR, MC 3382
                          DETROIT, MICHIGAN 48226-3382

A.       BOARD ON WHICH I SERVE AS DIRECTOR:

         ___   COMERICA BANK
         ___   COMERICA BANK- CALIFORNIA
         ___   COMERICA BANK - TEXAS
         ___   COMERICA ADVISORY BOARD

B.       ELECTION TO DEFER FEES. PURSUANT TO PROVISIONS OF THE ABOVE REFERENCED
         PLANS, I HEREBY ELECT TO HAVE THE FEES SPECIFIED BELOW WHICH BECOME
         PAYABLE TO ME FOR RENDERING SERVICES AS A MEMBER OF THE BOARD OF
         DIRECTORS ON WHICH I SERVE DEFERRED IN THE MANNER SPECIFIED BELOW. I
         UNDERSTAND AND AGREE THAT THIS ELECTION SHALL BECOME EFFECTIVE ON THE
         DATE OF THE ANNUAL MEETING OF SHAREHOLDERS, IMMEDIATELY FOLLOWING
         RECEIPT OF THIS ELECTION BY THE OFFICE OF THE CHAIRMAN OF COMERICA
         INCORPORATED OR ON THE FIRST DAY OF THE MONTH FOLLOWING RECEIPT BY SUCH
         IF I AM NEWLY ELECTED DIRECTOR OF COMERICA. I UNDERSTAND THAT THIS
         ELECTION SHALL BE IRREVOCABLE WITH RESPECT TO FEES ONCE I HAVE
         PERFORMED THE SERVICES WHICH ENTITLE ME TO RECEIVE SUCH FEES. THIS
         ELECTION SHALL CONTINUE IN EFFECT UNTIL I MODIFY OR REVOKE IT.

                                      A2-1

<PAGE>   13

C.       PERCENTAGE OF FEES TO BE DEFERRED

         DISCRETIONARY
         (SELECT UP TO 100%)
                           _______ COMERICA COMMON STOCK FUND

                           _______ MUNDER INDEX 500 FUND

                           _______ MUNDER BOND FUND

                           _______ MUNDER SHORT TERM BOND FUND

                           _______ MUNDER SMALL COMPANY GROWTH FUND

                           _______ MUNDER CASH INVESTMENT FUND

D.       YEAR DISTRIBUTION OF DEFERRED FEES IS TO COMMENCE:      20__
         PAYMENTS WILL BE MADE OR COMMENCE ON MAY 30TH OF THE YEAR SELECTED.

E.       PAYMENT METHOD DESIRED:

         ___      LUMP SUM

         ___      INSTALLMENTS OVER _____ YEARS (YOU MAY CHOOSE 2, 5 OR 10
                  YEARS). (THE BALANCE OF ANY FEE DEFERRAL ACCOUNT WILL BE
                  DISTRIBUTED IN ONE LUMP SUM TO THE DIRECTORS DESIGNATED
                  BENEFICIARY IF THE DIRECTOR DIES BEFORE RECEIPT OF ALL
                  INSTALLMENT PAYMENTS).

         FREQUENCY OF INSTALLMENTS:

         ___   ANNUALLY

         ___   EVERY 3 MONTHS

DATE:    MAY 21, 1999                                   _______________________

                                                        SIGNATURE OF DIRECTOR

NAME           _________________________________

ADDRESS        _________________________________

               _________________________________

SOCIAL SECURITY # _____________________________

                                      A2-2

<PAGE>   14

                                                                     EXHIBIT "B"

                              COMERICA INCORPORATED
                           DIRECTOR FEE DEFERRAL PLAN

                   NOTICE OF CANCELLATION OF DEFERRAL ELECTION

         A DIRECTOR WHO WISHES TO CANCEL A DEFERRAL ELECTION SHOULD SIGN AND
DATE THIS FORM AND RETURN IT TO:

                                  ALBERT TAYLOR
                              COMERICA INCORPORATED
                                500 WOODWARD AVE
                               31ST FLOOR, MC 3382
                          DETROIT, MICHIGAN 48226-3382

         PURSUANT TO PROVISIONS OF THE ABOVE REFERENCED PLAN, I HEREBY CANCEL MY
DEFERRAL ELECTION UNDER THE PLAN EFFECTIVE AS OF THE FIRST DAY OF THE MONTH
FOLLOWING YOUR RECEIPT OF THIS NOTICE OF CANCELLATION OF DEFERRAL ELECTION. THIS
CANCELLATION SHALL APPLY ONLY TO UNEARNED FEES THAT WOULD, BUT FOR THIS
CANCELLATION, BE DEFERRED UNDER MY PRIOR DEFERRAL ELECTION. ANY FEES I HAVE
PREVIOUSLY ELECTED TO DEFER THAT HAVE ALREADY BEEN EARNED THROUGH MY RENDERING
OF SERVICES SHALL REMAIN SUBJECT TO MY PRIOR DEFERRAL ELECTION.

DATE: __________________                           ___________________________
                                                     SIGNATURE OF DIRECTOR

NAME:          ___________________________________

ADDRESS:       ___________________________________

               ___________________________________

SOCIAL SECURITY # _____________________________

                                       B-1

<PAGE>   15

                                                                     EXHIBIT "C"

                              COMERICA INCORPORATED
                           DIRECTOR FEE DEFERRAL PLAN

                  NOTICE OF REALLOCATION OF INVESTMENT OPTIONS

         A DIRECTOR WHO WISHES TO REALLOCATE INVESTMENT OPTIONS OF DEFERRED
DIRECTOR FEES SHOULD SIGN AND DATE THIS FORM AND RETURN IT TO:

                                  ALBERT TAYLOR
                              COMERICA INCORPORATED
                                500 WOODWARD AVE
                               31ST FLOOR, MC 3382
                          DETROIT, MICHIGAN 48226-3382

         PURSUANT TO PROVISIONS OF THE COMERICA INCORPORATED 1999 DISCRETIONARY
DIRECTOR DEFERRAL FEE PLAN, I HEREBY CANCEL MY PREVIOUS INVESTMENT OPTION
ALLOCATION UNDER THE PLAN EFFECTIVE AS OF THE FIRST DAY OF THE MONTH FOLLOWING
YOUR RECEIPT OF THIS NOTICE OF REALLOCATION OF INVESTMENT OPTION. ANY FEES I
HAVE PREVIOUSLY ELECTED TO DEFER WILL BE REALLOCATED IN SUCH PORTIONS AND TO
SUCH FUND(S) AS DESIGNATED BELOW:

         PERCENTAGE OF FEES TO BE DEFERRED

         DISCRETIONARY
         (SELECT UP TO 100%)

                           _______ COMERICA COMMON STOCK FUND

                           _______ MUNDER INDEX 500 FUND

                           _______ MUNDER BOND FUND

                           _______ MUNDER SHORT TERM BOND FUND

                           _______ MUNDER SMALL COMPANY GROWTH FUND

                           _______ MUNDER CASH INVESTMENT FUND

_______________________________                           ________________
     SIGNATURE OF DIRECTOR                                      DATE

                                       C-1

<PAGE>   16

                                                                     EXHIBIT "D"

                              COMERICA INCORPORATED
                           DIRECTOR FEE DEFERRAL PLAN

                          BENEFICIARY DESIGNATION FORM

         A DIRECTOR WHO IS SUBMITTING AN ELECTION TO DEFER FEES SHOULD COMPLETE
THIS FORM, SIGN AND DATE IT AND RETURN IT TO:

                                  ALBERT TAYLOR
                              COMERICA INCORPORATED
                               500 WOODWARD AVENUE
                               31ST FLOOR, MC 3382
                          DETROIT, MICHIGAN 48226-3382

         PURSUANT TO THE PROVISIONS OF THE COMERICA INCORPORATED 1999 COMMON
STOCK DIRECTOR FEE DEFERRAL PLAN OR THE COMERICA INCORPORATED 1999 DISCRETIONARY
DIRECTOR FEE DEFERRAL PLAN (THE "PLAN), I HEREBY DESIGNATE THE PERSON(S) NAMED
BELOW AS BENEFICIARY OF ALL SUMS HELD UNDER THE PLAN WHICH ARE OWING TO ME AT
THE TIME OF MY DEATH.

A.       PRIMARY BENEFICIARY (CHECK ONE BOX AND PROVIDE RELATED INFORMATION):

         1.    ___ MY SPOUSE.

               NAME OF SPOUSE ___________________   SOCIAL SECURITY#____________

               ADDRESS _________________________________________________

                       _________________________________________________

         2.    ___ THE SUCCESSOR TRUSTEE(S) OF MY REVOCABLE LIVING TRUST.

               CAPTION APPEARING ON TRUST AGREEMENT ____________________________

               DATE OF ORIGINAL OR AMENDED AND RESTATED TRUST AGREEMENT ________

               EMPLOYER IDENTIFICATION NUMBER                 __________________

         3.    ___ THE EXECUTOR, ADMINISTRATOR OR PERSONAL REPRESENTATIVE OF MY
               ESTATE.

         4.    ___ OTHER (EACH BENEFICIARY MUST BE OVER 18 YEARS OF AGE).

                                       D-1

<PAGE>   17

         A.    NAME OF BENEFICIARY ________________    SOCIAL SECURITY #_______

               RELATIONSHIP TO DIRECTOR ________________________________

               ADDRESS        __________________________________________

                              __________________________________________

               PORTION OF ACCOUNT TO BE DISTRIBUTED TO THIS BENEFICIARY _______%

         B.    NAME OF BENEFICIARY _____________  SOCIAL SECURITY #____________

               RELATIONSHIP TO DIRECTOR ________________________________

               ADDRESS        __________________________________________

                              __________________________________________

               PORTION OF ACCOUNT TO BE DISTRIBUTED TO THIS BENEFICIARY _______%

               (IF YOU WISH TO NAME MORE THAN TWO BENEFICIARIES, PLEASE SUBMIT
               DUPLICATE COPIES OF THIS FORM AND INSERT APPROPRIATE PERCENTAGES.
               PLEASE SIGN AND DATE EACH COPY OF THIS FORM WHICH IS SUBMITTED.)

B.       ALTERNATE BENEFICIARY

         IF ALL PERSONS NAMED ABOVE AS MY PRIMARY BENEFICIARY PREDECEASE ME OR
SUCH PERSON(S) AND I DIE IN A COMMON DISASTER UNDER SUCH CIRCUMSTANCES THAT IT
IS IMPOSSIBLE TO DETERMINE WHO SURVIVED THE OTHER, THEN I DESIGNATE THE
FOLLOWING PERSON AS ALTERNATE BENEFICIARY TO RECEIVE THE SUMS THAT WOULD
OTHERWISE HAVE BEEN PAYABLE TO THE PRIMARY BENEFICIARY IF THE PRIMARY
BENEFICIARY HAD SURVIVED.

               NAME OF ALTERNATE BENEFICIARY ___________________________

               SOCIAL SECURITY OR EIN # ________________________________

               ADDRESS              ______________________________

                                    ______________________________

                                       D-2

<PAGE>   18

         THIS DESIGNATION SUPERSEDES ANY PREVIOUS BENEFICIARY DESIGNATION I MAY
HAVE MADE WITH RESPECT TO DEFERRED FEES UNDER THE PLAN, INCLUDING PRIOR VERSIONS
OF THE PLAN. I RESERVE THE RIGHT TO CHANGE THE BENEFICIARY(IES) NAMED HEREIN IN
ACCORDANCE WITH THE TERMS OF THE PLAN. IF THERE ARE NO ALTERNATE BENEFICIARIES
LIVING OR IN EXISTENCE AT THE DATE OF MY DEATH, I UNDERSTAND THAT THE BALANCE OF
MY ACCOUNT WILL BE PAID TO THE LEGAL REPRESENTATIVE OF MY ESTATE.

_______________________________                      ________________
    SIGNATURE OF DIRECTOR                                  DATE

_______________________________                      ________________
    SIGNATURE OF WITNESS                                   DATE

                                      D-3

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