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Home >> Mercedes Benz >> 1993 >> 500SL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Ignition System >> System Tests >> Preparation For Test (Section 22) >> Test Preparation
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Test Preparation

  1. Turn ignition OFF.
  2. CAUTION: When performing test and adjustment work, the engine RPM should only be raised using the accelerator pedal. If the engine speed is raised via the control linkage in the engine compartment, the "Limp Home" mode will become active and will be registered in the electronic accelerator malfunction memory as a fault. The ASR will also come on.
  3. Disconnect socket box with DI control module (N1/3). See Fig 1 and Fig 2 .
Fig 1: Identifying Special Tools
G00224228Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Fig 2: ConnectingSocket Box To DI Control Module
G00224229Courtesy of MERCEDES-BENZ OF NORTH AMERICA.