Camtronic / timing actuator issues
Often reportedIn the OM656 engine (2.9 V6 diesel), issues with the variable valve timing system (Camtronic) may occur; faulty electro-pneumatic actuators or control solenoid valves are reported.
Engine Internal
The most frequently mentioned issue when buying a used Mercedes-Benz CLS 350d 4MATIC 9G-TRONIC 2020: Camtronic / timing actuator problems. Also, carbon buildup: EGR/ducts and DPF are frequently reported.
Limited verified data
Most reported issue: Camtronic / timing actuator issues. Service history and a test drive matter.
Listed from most frequently reported, each with its source.
In the OM656 engine (2.9 V6 diesel), issues with the variable valve timing system (Camtronic) may occur; faulty electro-pneumatic actuators or control solenoid valves are reported.
Engine Internal
In the 2.9 diesel OM656 engine, rapid carbon buildup in the intake ducts and EGR system, DPF clogging and failures can occur in city driving.
Exhaust Emissions
Same trim, different year
We only publish claims we can verify. Cards come from European fault records and owner reports matched to this vehicle on brand, fuel, engine and generation.