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Engine Controls - Tests W/codes - Hfm-Sfi System: Maintenance Mercedes-Benz C-class W202

Testing & Diagnostics

RESETTING & REACTIVATING ENGINE CONTROL MODULE MEMORY

Note. Control modules manufactured by Bosch up to 8/93, the start button must be pressed 5-6 seconds to clear the DTC memory and 8-9 seconds to reset and reactivate the engine control module memory.

  1. Clear diagnostic trouble code (DTC) memory. See .
  2. After the number "1" appears, press the start button for 6-8 seconds.
  3. Switch ignition OFF and wait minimum of 2 seconds.
  4. Turn ignition ON, wait a minimum of 10 seconds and then start engine.

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