When buying a used Mercedes-Benz CLA 200d 2020 (118), the most frequently mentioned issue is AdBlue/SCR system failures. Additionally, DPF regeneration and clogging problems are also commonly reported.
Engine varies by trim; verify the engine code on the listing.
Listed from most frequently reported, each with its source.
The OM654 engine in the CLA 200d features an advanced SCR system using AdBlue and NOx sensors. On the road, failures of the dosing pump, injection nozzle, and NOx sensors are reported; they can cause warning messages, performance limitation, or in some cases more serious issues.
Exhaust Emissions
If the vehicle is mostly used for short trips in the city, the DPF can clog because effective regeneration is prevented.
Exhaust Emissions
The OM654 engine uses a dual-circuit EGR system that can accumulate soot and deposits over time, especially in city driving. This can lead to slow or stuck EGR valves, rough idle, check engine light, and fault codes.
Exhaust Emissions
The OM654's high-pressure common-rail system and piezoelectric injectors require proper fuel and maintenance. Fault codes related to the high-pressure pump (e.g., P0251) or injector failures can occur, leading to power loss, hard starting, and rough idle.
Fuel System
Turbo pressure loss codes and faulty turbo sensors/actuators are reported on OM654 engines. Common causes include faulty actuators, intake leaks, or stuck variable geometry.
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.