1994 Mercedes Benz SL320FACTORY OEM SERVICE PROCEDURE

Test Preparation For DTC Readout

  1. Connect impulse counter scan tool and adapter or HHT to data link connector (X11/4). See Fig 1.
  2. Connect Yellow wire from impulse counter scan tool as follows:

    1. Socket 8

      Base Module - BM (N16/1)

    2. Socket 6

      ABS or ASR control module (N30 or N30/1)

    3. Socket 12

      SPS control module (N49/1)

    4. Socket 11

      ADS control module (N51)

    5. Socket 4

      HFM-SFI control module (N3/4)
  3. Turn ignition ON.
  4. Read DTC memory for BM, ABS, ABS/ASR, SPS, ADS, HFM-SFI control modules.
Fig 1: Identifying Special Tools
G00224204Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.