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                                                                EXHIBIT 4(f)(64)

                AMENDMENT NO. 1 TO SALE AND SERVICING AGREEMENT

         This AMENDMENT NO. 1 TO SALE AND SERVICING AGREEMENT (the "Amendment")
is dated as of January 19, 2005, and entered into by and among CREDIT ACCEPTANCE
FUNDING LLC 2004-1, as the Seller (the "Seller"), CREDIT ACCEPTANCE CORPORATION,
as the Servicer (the "Servicer"), and JPMORGAN CHASE BANK, as the Trust
Collateral Agent/Indenture Trustee (the "Trust Collateral Agent").

         Capitalized terms used and not defined in this Amendment shall have the
meanings given such terms in the Sale and Servicing Agreement, dated as of
August 25, 2004 (the "Sale and Servicing Agreement"), among Credit Acceptance
Auto Dealer Loan Trust 2004-1, the Seller, the Servicer, the Trust Collateral
Agent, and Systems & Services Technologies, Inc.

                             PRELIMINARY STATEMENTS

         WHEREAS, each of the signatories hereto is party to the Sale and
Servicing Agreement; and

         WHEREAS, each of the signatories hereto wishes to amend the Sale and
Servicing Agreement as hereinafter provided;

         NOW, THEREFORE, in consideration of the mutual covenants contained
herein and in the Sale and Servicing Agreement, and other good and valuable
consideration, the receipt and adequacy of which is hereby expressly
acknowledged, and intending to be legally bound hereby, the signatories hereto
agree as follows:

         SECTION 1. Amendment. Section 3 of Schedule D to Sale and Servicing
Agreement is hereby amended by deleting Section 3 of Schedule D in its entirety
and replacing it with the following:

                  "Credit Acceptance shall, on a Consolidated basis, maintain
                  Consolidated Tangible Net Worth of not less than Two Hundred
                  Million Dollars ($200,000,000), plus the sum of (i) eighty
                  percent (80%) of Consolidated Net Income for each fiscal
                  quarter of Credit Acceptance (A) beginning on or after April
                  1, 2004, (B) ending on or before the applicable date of
                  determination thereof, and (C) for which Consolidated Net
                  Income as determined above is a positive amount and (ii) the
                  Equity Offering Adjustment.".

         SECTION 2. Severability of Provisions. Any provision of this Amendment
which is prohibited or unenforceable in any jurisdiction shall, as to such
jurisdiction, be ineffective to the extent of such prohibition or
unenforceability without invalidating the remaining provisions hereof or
affecting the validity or enforceability of such provision in any other
jurisdiction.

         SECTION 3. Captions. The captions in this Amendment are for convenience
of reference only and shall not define or limit any of the terms or provisions
hereof.

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         SECTION 4. Agreement to Remain in Full Force and Effect. Except as
amended hereby, the Sale and Servicing Agreement shall remain in full force and
effect. All references in the Sale and Servicing Agreement to "herein," or words
of like import, and all references to the Sale and Servicing Agreement in any
agreement or document shall hereafter be deemed to refer to the Sale and
Servicing Agreement as amended hereby.

         SECTION 5. GOVERNING LAW. THIS AMENDMENT SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

         SECTION 6. Execution in Counterparts. This Amendment may be executed in
any number of counterparts and by different parties hereto on separate
counterparts, each of which counterparts, when so executed and delivered, shall
be deemed to be an original and all of which counterparts, taken together, shall
constitute but one and the same Amendment.

         SECTION 7. Waiver of Notice. Each of the parties hereto hereby waives
any notice in connection with the execution and delivery of this Amendment.

                            [signature page follows]

                                       2
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         IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
executed as of the date and year first above written.

                               CREDIT ACCEPTANCE FUNDING LLC 2004-1, as the
                               Seller

                               By:     /s/ Douglas W. Busk
                                  --------------------------------------------
                                    Name:  Douglas W. Busk
                                    Title: Treasurer

                               CREDIT ACCEPTANCE CORPORATION, as the Servicer

                               By:     /s/ Douglas W. Busk
                                  --------------------------------------------
                                    Name:  Douglas W. Busk
                                    Title: Treasurer

                               JPMORGAN CHASE BANK, as the Trust Collateral
                               Agent/Indenture Trustee

                               By:     /s/ Esther Antoine
                                  --------------------------------------------
                                    Name:  Esther Antoine
                                    Title: Trust Officer

         The undersigned hereby irrevocably consents to this Amendment, and to
its execution by the Seller, the Servicer and the Trust Collateral Agent.

                               RADIAN ASSET ASSURANCE INC.

                               By:     /s/ Paul Kazmierczak
                                  --------------------------------------------
                                    Name:  Paul Kazmierczak
                                    Title: Vice President

                               XL CAPITAL ASSURANCE INC.

                               By:     /s/ Christine Brunie
                                  --------------------------------------------
                                    Name:  Christine Brunie
                                    Title: Directorexv10w1

 

EXHIBIT 10.1

WEATHERFORD VARIABLE COMPENSATION PLAN

I. PURPOSE

The Weatherford Variable Compensation Plan (the “Plan”) has been designed to motivate and reward
employees whose efforts impact the performance of Weatherford International Ltd. and its
subsidiaries and affiliates (the “Company”) through the achievement of pre-established financial
objectives.

Performance under the Plan is measured on the Company’s applicable fiscal (calendar) year and any
declared payments under the Plan are made after the end of the fiscal year.

II. ELIGIBILITY

Officers and key management employees of the Company are eligible to participate in the Plan upon
designation by the Chief Executive Officer of Weatherford. An employee who is eligible to
participate in a sales commission plan of the Company is not eligible to participate in the Plan.
Eligibility of employees on day rates, per diems and special pay programs will be determined by
Division Presidents for their Divisions. Participation in the Plan is not automatic, and only
those eligible employees who have been designated by the Chief Executive Officer shall participate
in the Plan. Employees must have six months of employment to be eligible for the plan. Bonus
payments for employees not employed for a full year will be prorated.

III. AWARD CRITERIA

The Compensation Committee of the Board and the Chief Executive Officer of Weatherford are
responsible for approving the Company financial objectives that are used to determine awards under
this Plan. Financial objectives for group operating units at the Divisional levels will be
established by the appropriate manager, subject to overall approval by the Chief Executive Officer.
Performance under the Plan will be determined based on:

          EBIT (in absolute $ terms)

          Working Capital Ratios

___% of the bonus award, if any, will be based on EBIT and ___% on working capital ratios. The
Company reserves the right on a Company-wide or case-by-case basis to adjust the EBIT and/or
working capital ratio targets of the Divisions or Corporate to reflect the impact of acquisitions,
changes in our industry, changes in our financial performance and any other circumstances at the
sole discretion of the Company’s Chief Executive Officer.

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IV. AWARD CATEGORIES

A participant may have Corporate, Division or group operating unit financial objectives, depending
on where employed.

V. TARGET AWARDS

A target award percentage is established for each position eligible to participate in the Plan as a
percentage of base annual salary. Target awards may vary depending on the participant’s position
and base salary.

Generally, the participating employee receives the target award when performance under the Plan
meets, but does not exceed, the pre-established financial objectives.

VI. PERFORMANCE MEASUREMENT

	 	 	 
	Minimum

	 	This is the lowest level of performance
for which an award will be generated. There
will be no payment for performance below the
minimum level of performance.
	 
	 	 
	Target Performance

	 	This is the expected, or budgeted, level of performance and the award
paid for target performance is the Target Award.
	 
	 	 
	Maximum

	 	This is the performance level for which
the maximum award under the plan will be paid.
This is paid for a performance level at or above
the maximum threshold.

VII. AWARD CALCULATION

Attainment of the financial objectives of the Plan is measured based on actual financial results as
compared to Plan targets, with performance above or below Plan targets prorated up/down to the
maximum/minimum levels established for each financial objective. The cost of the bonus payouts
must be included in the financial results to be measured.

VIII. ALTERNATIVE CALCULATIONS

There may be circumstances under which the financial performance of the Company does not generate
an award under the Plan. The nature and scope of the Company’s operations are such that at times
unanticipated economic and market conditions may render pre-established financial objectives
unattainable in any given Plan year. If, in the opinion of the Chief Executive Officer, such
circumstances should arise, an alternative bonus calculation may be performed.

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IX. MODIFICATIONS

If, during a Plan year, there has occurred or should occur, in the opinion of the Company’s Chief
Executive Officer, a significant beneficial or adverse change in economic conditions, the
indicators of growth or recession in the Company’s business segments, the nature of the operations
of the Company, or applicable laws, regulations or accounting practices, or other matters that were
not anticipated by the Company when it approved Corporate, Division and group operating unit
financial objectives for the Plan year and which, in Management’s judgment, had or have or are
expected to have a positive or negative effect on the Company, the Chief Executive Officer may
modify or revise the financial objectives for the Plan year in such manner as he deems appropriate
in his sole judgment. By way of illustration, and not limitation, such significant changes might
result from sales of assets, or mergers, acquisitions, divestiture, or spin-offs.

Notwithstanding the above, the Plan is subject to suspension or termination at any time (even if
the financial objectives of the Plan have been achieved) by the Chief Executive Officer of the
Company, if, in his sole judgment, conditions or circumstance exist or may exist that had, have or
are expected to have a negative effect on the Company.

X. PAYMENT

Any Plan awards earned and declared for a Plan year will be paid in February or March of the
following year. Payment may be in the form of cash or common shares of the Company. The form of
payment will be determined by the Compensation Committee of the Board and the CEO.

Employees terminating prior to the date on which awards are paid are not eligible for payment of
any award under this Plan unless termination is due to death or retirement. In such cases, any
bonus payments will be prorated to the date of termination and determined on the basis of bonuses
actually paid to similarly situated employees.

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Annual Incentive Plan Structure

	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 	 	Bonus as Percent of Base	 	 
	Group	 	Min.	 	Target	 	Max.	 	Financial Objective Weighting
	 
	Corporate CEO
	 	 	60	%	 	 	120	%	 	 	180	%	 	__% EBIT and __%
Working Capital Ratios
	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	

	 	 	 	 	 	 	 	 	 	 	 	 	 	 	1.	 	 	Corporate employees based

100% on Corporate results
	 
	 

	 
	Division Presidents

Corporate Sr. VP’s

	 	 	50	%	 	 	95	%	 	 	145	%	 	 	2.	 	 	Division Presidents — Bonus
is based 80% on Division
results and 20% on Corporate
results
	 
	 

	 
	Corporate VP’s

	 	 	40	%	 	 	80	%	 	 	120	%	 	 	3.	 	 	All others based on Division

results or group results as

determined by Division Presidents
	 

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FORM OF AWARD LETTER

____________, ____

Re: Variable Compensation Plan Award

Dear Weatherford Employee:

We are pleased to advise you that your award under the Weatherford Variable Compensation Plan for
year ___will be ___. Thank you for your hard work and efforts during ___on
Weatherford’s behalf.

Sincerely,

Weatherford International Ltd.

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