Carbon buildup on intake valves
Often reportedOn direct injection engines like the M276, carbon buildup can occur on intake valves over time, leading to efficiency loss, hesitation during acceleration, and rough running.
Engine Internal
When buying a used Mercedes-Benz C-Class C400 2022 (206), the most frequently mentioned issue is carbon buildup on intake valves. Oil leaks from the timing chain cover/gaskets are also commonly reported.
Engine varies by trim; verify the engine code on the listing.
Listed from most frequently reported, each with its source.
On direct injection engines like the M276, carbon buildup can occur on intake valves over time, leading to efficiency loss, hesitation during acceleration, and rough running.
Engine Internal
Oil leaks around the timing chain cover and gaskets can cause intermittent oil consumption and require costly removal of the cover for repair.
Engine Internal
On the V6 M276 engine, timing chain tensioners may wear or fail. This can cause rattling noises on cold start or at idle, and if unchecked, risk of chain skipping.
Timing chain
The V6 biturbo in the W205 can experience turbo system problems: leaks in intercooler/intake manifold pipes, turbo actuator or seal wear can cause power loss, check engine light, and low boost codes.
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.