<PAGE>
 
                                                                    EXHIBIT 10.8

                           COMPREHENSIVE AMENDMENT TO
                           --------------------------

                     CERTIFIED GROCERS OF CALIFORNIA, LTD.
                     -------------------------------------

               EMPLOYEES' SUPPLEMENTAL DEFERRED COMPENSATION PLAN
               --------------------------------------------------
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
<TABLE>
<CAPTION>

ARTICLE                                                          Page
-------                                                          ----
<S>            <C>                                                  <C>
I              INTRODUCTION......................................   1
               ------------
               Section 1.1     Name..............................   1
               Section 1.2     Purposes..........................   1

II             DEFINITIONS.......................................   1
               Section 2.1     Definitions.......................   1

III            ELIGIBILITY.......................................   2
               Section 3.1     Eligibility.......................   2

IV             BENEFITS..........................................   3
               Section 4.1     Amounts of Benefits...............   3
               Section 4.2     Form and Timing of Benefit
                               Payments..........................   4
               Section 4.3     Benefits Unfunded.................   4
               Section 4.4     Payment to Beneficiary............   4

V              ADMINISTRATION....................................   5
               Section 5.1    Duties of Administrator............   5
               Section 5.2    Claims Procedure...................   5
               Section 5.3    Finality of Decisions..............   5

VI             AMENDMENT AND TERMINATION.........................   5
               Section 6.1    Amendment and Termination..........   5
               Section 6.2    Contractual Obligation.............   5

VII            MISCELLANEOUS.....................................   6
               Section 7.1    No Employment Rights...............   6
               Section 7.2    Assignment.........................   6
               Section 7.3    Law Applicable.....................   6

SIGNATURES..........................................................6
</TABLE>

                                       i
<PAGE>
 
                           COMPREHENSIVE AMENDMENT TO
                           --------------------------

                     CERTIFIED GROCERS OF CALIFORNIA, LTD.
                     -------------------------------------

               EMPLOYEES' SUPPLEMENTAL DEFERRED COMPENSATION PLAN
               --------------------------------------------------


          This agreement executed by CERTIFIED GROCERS OF CALIFORNIA, LTD., a
corporation organized under the laws of the State of California, evidences the
terms of a Comprehensive Amendment to Certified Grocers of California, Ltd.
Employees' Supplemental Deferred Compensation Plan, that was originally
effective January 1, 1987 and amended from time to time thereafter.

          This Comprehensive Amendment is effective September 3, 1989 and the
terms of the Plan shall be as follows:

                                   ARTICLE  I

                                  INTRODUCTION
                                  ------------

          Section 1.1    Name.  The Plan evidenced by the terms hereof shall be
                         ----                                                  
known as the "Certified Grocers of California Ltd. Employees' Supplemental
Deferred Compensation Plan."

          Section 1.2    Purposes.  The Plan is designed to provide supplemental
                         --------                                               
retirement and other benefits to the Employee and the beneficiaries of such
Employee.  The Plan is intended to be a top hat plan by providing deferred
compensation for particular employees who are members of a select group of
management or highly compensated employees.

                                  ARTICLE  II

                                  DEFINITIONS
                                  -----------

          Section 2.1    Definitions.  When used herein the following terms
                         -----------                                       
shall have the following meanings unless a different meaning is clearly required
by the context of the Plan.

             (a) The "Administrator" shall mean the plan administrator of the
     Certified Grocers of California, Ltd. Employees' Sheltered Savings Plan.

             (b) The "Beneficiary" shall mean the person or persons or trust
     designated in writing on forms supplied by the Administrator that are
     delivered prior to death to the Administrator by the Participant to receive
     benefits under the Plan in the event of death of the 

                                       1
<PAGE>
 
     Participant as provided herein; or if no effective designation is made,
     then Beneficiary means the Participant's spouse, but if the Participant has
     no spouse at his death, then Beneficiary means his estate.

             (c) The "Code" shall mean the Internal Revenue Code of 1986, as
     amended from time to time.

             (d) The "Company" shall mean Certified Grocers of California, Ltd.,
     any corporation which subsequently adopts the Plan as a whole or as to one
     or more of its divisions, and any successor corporation which continues the
     Plan.

             (e) "Employee" shall mean any person who renders services to the
     Company in the status of an employee as that term is defined in Section
     3121(d) of the Code.

             (f) "Participant" shall mean any Employee entitled to receive
     benefits under the Plan.

             (g) "Plan" shall mean Certified Grocers of California, Ltd.
     Employees' Supplemental Deferred Compensation Plan.

             (h) The "Retirement Plan" shall mean the Retirement Plan for
     Employees of Certified Grocers of California, Ltd.

             (i) "Separation from Service" shall mean the date that a
     Participant ceases to be an Employee because of a voluntary or involuntary
     quit, layoff or termination, or in the event of death.

             (j) The "Sheltered Savings Plan" shall mean the Certified Grocers
     of California, Ltd. Employees' Sheltered Savings Plan.

                                  ARTICLE  III

                                  ELIGIBILITY
                                  -----------

          Section 3.1    Eligibility.  All Employees and beneficiaries of
                         -----------                                     
Employees eligible to receive benefits from the Sheltered Savings Plan and the
Retirement Plan shall be eligible to receive benefits under this Plan in
accordance with Section 4.1 of this Plan.

                                       2
<PAGE>
 
                                  ARTICLE  IV

                                    BENEFITS
                                    --------

           Section 4.1   Amounts of Benefits.  The amount of benefits payable
                         -------------------                                 
under the Plan, if any, shall be equal to:

             (a) To the extent a Participant defers receipt of compensation from
     the Company under this Plan, the benefit which would have been allocable
     to, or on behalf of, an Employee under the Sheltered Savings Plan as a
     result of contributions of deferred compensation under Section 7.1 of the
     Sheltered Savings Plan and Company matching contributions under Sections
     5.1(b) or (c) of the Sheltered Savings Plan or its successor sections which
     were not made because Section 402(g) of the Code limits contributions of
     deferred compensation under Section 7.1 of the Sheltered Savings Plan to
     $7,000 (or such greater amount as may be allowed by law) for each calendar
     year commencing January 1, 1987;

             (b) For the plan year beginning September 3, 1989, to the extent a
     Participant defers receipt of compensation from the Company under this
     Plan, the benefit which would have been allocable to, or on behalf of, a
     Participant under the Sheltered Savings Plan for compensation of a
     Participant paid by the Company in excess of $200,000 (or such greater
     amount that may be allowed by law), and for the plan year beginning
     September 4, 1994, Compensation of a Participant paid by the Company in
     excess of $150,000 (or such greater amount that may be allowed by law) that
     was not taken into account under the Sheltered Savings Plan because of
     Section 401(a)(17) of the Code; and

             (c) The lump sum equivalent of the benefit that would have been
     payable to, or on behalf of, a Participant under the Retirement Plan which
     would have been accrued but for the fact that the Participant elected to
     defer a portion of his or her compensation under Section 4.1(a) of this
     Plan thereby reducing the amount of the Participant's compensation for
     purposes of calculating the Retirement Plan benefit.  Since in no event can
     the Retirement Plan in accruing a benefit take into account compensation in
     excess of the limits provided by Section 401(a)(17) of the Code, then the
     benefit provided by this paragraph is limited in the same way.

                                       3
<PAGE>
 
          For the purposes of determining such benefit, but subject to the
provisions of Section 4.4, the amount of the foregone Company contributions
under paragraphs (a) and (b) shall be credited with earnings (or losses as the
case might be) at a rate equal to the rate which is actually earned by the
Company on funds specifically reserved by the Company to be used to pay such
benefits in the future.  Each Employee, subject to the approval of the
Administrator, may designate the type of investment in which the foregone
Company contributions shall be invested.  For purposes of determining the lump
sum equivalent under paragraph (c), the same assumptions used in determining the
actuarial equivalence in the Retirement Plan shall be used.

          Section 4.2    Form and Timing of Benefit Payments. The benefit
                         -----------------------------------             
payable to, or on behalf of, a Participant as determined under Section 4.1(a)
shall be paid as follows:

             (a) if the benefit is less than $100,000, then the benefit will be
     paid in a lump sum;

             (b) if the benefit is $100,000 or more, but less than $200,000,
     then the benefit will be paid in two annual installments; or

             (c) if the benefit is $200,000 or more, then the benefit will be
     paid in three annual installments.

Benefit payments hereunder will commence as soon as administratively feasible
following the Participant's Separation from Service.

          Section 4.3    Benefits Unfunded.  The benefits payable under the Plan
                         -----------------                                      
shall be paid by the Company out of its general assets and shall not be
otherwise specifically funded in any manner.  Nothing herein contained shall
preclude the creation of a bookkeeping or other reserve for benefits payable
hereunder.

          Section 4.4    Payment to Beneficiary.  In the event of the death of a
                         ----------------------                                 
Participant, either before or after payments or distributions to the Participant
have begun, the amount remaining to be  paid shall be paid to the Participant's
Beneficiary computed in the same manner, and payable at the same time, as if the
Participant were still living.

                                       4
<PAGE>
 
                                   ARTICLE  V

                                 ADMINISTRATION

          Section 5.1    Duties of Administrator.  The Plan shall be
                         -----------------------                    
administered by the Administrator in accordance with its terms and purposes.
The Administrator shall determine the amount and manner of payment of the
benefits due to or on behalf of each Employee from the Plan and shall attempt to
cause them to be paid by the Company accordingly.

          Section 5.2    Claims Procedure.  In case the claim of any Participant
                         ----------------                                       
or Beneficiary for benefits under the Plan is denied, the Administrator shall
provide adequate notice in writing to such claimant, setting forth the specific
reasons for such denial.  The notice shall be written in a manner calculated to
be understood by the claimant.  The Administrator shall afford a Participant or
Beneficiary, whose claim for benefits has been denied, 60 days from the date
notice of such denial is delivered or mailed in which to appeal the decision in
writing to the Administrator.  If the Participant or Beneficiary appeals the
decision in writing within 60 days, the Administrator shall review the written
comments and any submissions of the Participant or Beneficiary and render its
decision regarding the appeal, all within 60 days of such appeal.

          Section 5.3    Finality of Decisions.  The decisions made by and the
                         ---------------------                                
actions taken by the Administrator in the administration of the Plan shall be
final and conclusive as to all persons, and the Administrator shall not be
subject to individual liability with respect to the Plan.  Without limiting the
generality of this Section 5.2, the Administrator shall have the discretionary
authority to determine eligibility for benefits and to construe the terms of the
Plan.

                                  ARTICLE  VI

                           AMENDMENT AND TERMINATION
                           -------------------------

          Section 6.1    Amendment and Termination.  While the Company intends
                         -------------------------                            
to maintain the Plan in conjunction with the Sheltered Savings Plan and the
Retirement Plan for as long as necessary, the Company reserves the right to
amend and/or fully or partially terminate the Plan at any time for whatever
reasons the Company may deem appropriate.

          Section 6.2    Contractual Obligation. Notwithstand ing Section 6.1,
                         ----------------------                               
the Company hereby makes a contractual commitment to pay the benefits accrued
under the Plan to the extent it is financially capable of meeting such
obligations.

                                       5
<PAGE>
 
                                  ARTICLE  VII

                                 MISCELLANEOUS
                                 -------------

          Section 7.1    No Employment Rights.  Nothing contained in the Plan
                         --------------------                                
shall be construed as a contract of employment between the Company and an
Employee, or as a right of any Employee to be continued in the employment of the
Company, or as a limitation of the right of the Company to discharge any of its
Employees, with or without cause.

          Section 7.2    Assignment.  The benefits payable under this Plan to
                         ----------                                          
any Participant or Beneficiary are not subject in any manner to anticipation,
alienation, sale, transfer, assignment, pledge, encumbrance and are not subject
to any claim, attachment, garnishment or levy by any creditor.

          Section 7.3    Law Applicable.  This Plan shall be governed by the
                         --------------                                     
laws of the State of California, except to the extent pre-empted by federal law.

          Executed at Los Angeles, California, this 5  day of December, 1995.
                                                   ---        --------

                    CERTIFIED GROCERS OF CALIFORNIA, LTD.



                    By: /s/ PAUL ROHDE
                        _________________________________



                    By: /s/ D.A. WOODWARD
                        ________________________________

                                       6