Keyless / EIS system problems
Often reportedMany W204 owners report faults with the key recognition system (Keyless Go) and EIS unit: 'Key not found' message, starting difficulty, or intermittent system lockouts.
Electrical
The most frequently mentioned issue when buying a used Mercedes-Benz C-Class C180 2012 (204 / Facelift): Keyless / EIS system problems. Also, timing chain wear on CGI engines is commonly reported.
Engine varies by trim; verify the engine code on the listing.
Listed from most frequently reported, each with its source.
Many W204 owners report faults with the key recognition system (Keyless Go) and EIS unit: 'Key not found' message, starting difficulty, or intermittent system lockouts.
Electrical
On facelifted W204 C-Class CGI engines (1.6/1.8 direct injection), early wear of the timing chain, tensioner, and guides is reported.
Timing chain
Many European forum users report early turbo wear or failure on 1.6/1.8 CGI turbo engines: oil leaks, abnormal noises, power loss, or need for early replacement.
Turbo
Same trim, different year
We only publish claims we can verify. Cards come from Difetti fault records matched to this vehicle on brand, fuel, engine and generation.