Dull thumping noise or ticking noise under the vehicle in the area of the engine/two-mass...
Mercedes-Benz technical service bulletin LI01.00-P-078171 for 2024 Mercedes-Benz AMG C63 S E, 2024-2025 Mercedes-Benz AMG C63 S E 4matic+ and 2025 Mercedes-Benz AMG Glc63 S E and others.
- Bulletin number
- LI01.00-P-078171
- Component
- Engine
- Summary
- Complaint Dull thumping noise or ticking noise under the vehicle in the area of the engine/two-mass flywheel/transmission. Is significantly perceptible at the front right wheel well and can also be faintly heard in the vehicle interior. Cause The ticking noise occurs in idle operation in drive program C (when the combustion engine is running) & S at 780 rpm when the state of charge of the battery is under 25% and the load requirement at the belt-driven starter alternator is simultaneously over 25 Nm. The load requirement can occur due to high basic consumers (e.g. electric refrigerant compressor, high-voltage booster heater or DC/DC converter) and auxiliary consumers (e.g. air conditioning system, steering wheel or seat heating, etc.). Remedy Current production configuration Do not replace any parts Create TIPS case and send to HQ together with the following documents: • Videos of the problem from the exterior and in the vehicle interior • Control unit log, engine N3/10 (ME) • Control unit log, drivetrain N127 (PTCU) • Control unit log, battery management system N82/10 (BMS) • Control unit log, DC/DC converter N83/1 (DDW) • Control unit log, electronic ignition lock N73 (EZS)
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