Mercedes Benz C 63 AMG Technical Service Bulletin #LI54-30_P-049068 Instruments - Tachometer Fluctuates By Approx. 100rpm Instrument cluster: Tachometer fluctuates
Mercedes Benz C 63 AMG Technical Service Bulletin #LI54-30_P-049068 Instruments - Tachometer Fluctuates By Approx. 100rpm Instrument cluster: Tachometer fluctuates Topic number LI54.30-P-049068 Date: 1003112010 Mercedes Benz C 63 AMG Sedan (204.077) V8-6.3L (156.985) Page 336 Version 1 Design group 54.30 Instrument cluster/display instruments/warning devices Date 03-11-2010 Validity Model 204 with comfort multifunction steering wheel (code 442) up to VIN ...A 324554 / ...F 383728 / ...R 091855 Model 207 up to VIN ...F 014219 Model 212 up to VIN ...A 079696 Reason for change Reason for block Complaint: Tachometer in instrument cluster (A1) fluctuates by approx. 100 rpm. Note: The complaint is observable primarily when idling. Cause: Dirt in the tachometer stepper motor in the instrument cluster (A1) Remedy: Check the engine speed on cold start and in warm-up with Xentry Diagnostics under Motor electronics (ME) control unit -> Actual values -> ...