1993 Mercedes Benz 400EFACTORY OEM SERVICE PROCEDURE

Preparation For Test (Section 22)

CAUTION: To avoid damaging control modules all electrical testing should be done with a DVOM. DO NOT use an analog meter or test light to check control module circuits.

Turn ignition OFF. Remove CC/ISC control module (N4/3). Connect socket box, see Fig 1 -Figure .

Fig 1: Identifying Special Tools
G00224186Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Factory Service Tools

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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.

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