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Diagnosis & Testing Using Diag Test Charts (500SEL, 500SL)

WARNING: This page is about a different car, the 1993 Mercedes-Benz 500SEL and 1993 Mercedes-Benz 500E. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Following SRS test charts require M-B Test Cable (124-589-35-63-00), M-B Socket Box Tester (124-589-00-21-00) and a high impedance DVOM or a M-B Multimeter (124-589-19-21-00).
  1. Disconnect and shield negative battery cable. Connect one end of M-B Test Cable (124-589-35-63-00) to M-B Socket Box Tester(124-589-00-21-00) and other end to appropriate SRS Red diagnostic connector. See SRS RED CONNECTOR LOCATION  table under DISABLING & ACTIVATING AIR BAG SYSTEM. See Fig 1 or Fig 2 . Reconnect negative battery cable.
  2. For all resistance and voltage measurements, use a high impedance DVOM or M-B Multimeter (124-589-19-21-00). Measure resistance and voltage by probing socket box tester terminals. DO NOT  probe air bag connectors, as damage and/or personal injury may result. See appropriate SRS diagnostic test charts for diagnosis. See SRS DIAGNOSTIC TEST CHART DIRECTORY  table.
SRS DIAGNOSTIC TEST CHART DIRECTORY

Model Test Steps Figure
500SL (1) 1 - 5.2 12
" 6 - 9.1 13
" 9.2 - 11 14
" 11.1 - 12 15
500SEL 1 - 4.2 16
" 5 - 12 17
(1) For voltage supply diagnosis for 500SL, see Figure .
Fig 1: Socket Box Tester & Test Cable Connections (500SL)
G91G12985Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Fig 2: Socket Box Tester (500SEL)
G92E21349Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Fig 3: SRS Diagnostic Chart For Impulse Display Codes (500SL)
G91H12986Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Fig 4: SRS Diagnostic Chart For Impulse Display Codes (500SL)
G91I12987Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Fig 5: SRS Diagnostic Chart For Impulse Display Codes (500SL)
G91J12988Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Fig 6: SRS Diagnostic Chart For Impulse Display Codes (500SL)
G91A12989Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Fig 7: SRS Diagnostic Chart For Impulse Display Codes (500SEL)
G92I21350Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Fig 8: SRS Diagnostic Chart For Impulse Display Codes (500SEL)
G92J21351Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Fig 9: SRS Diag. Chart For SRS Cntrl Unit Voltage Supply (500SL)
G92A21352Courtesy of MERCEDES-BENZ OF NORTH AMERICA.