DPF/FAP clogging
Often reportedFrequent DPF clogging is reported in small 1.5 diesel engines, especially in city or short trips; this prevents full regeneration.
Exhaust Emissions
The most frequently mentioned issue when buying a used Mercedes-Benz CLA 180d 2021: DPF/FAP clogging. Additionally, EGR valve clogging and failure are also commonly reported.
Be cautious
Most reported issue: DPF/FAP clogging. Service history and a test drive matter.
Listed from most frequently reported, each with its source.
Frequent DPF clogging is reported in small 1.5 diesel engines, especially in city or short trips; this prevents full regeneration.
Exhaust Emissions
The EGR valve in 1.5 dCi/OM608 engines tends to accumulate carbon deposits; this reduces effectiveness and causes rough running, power loss, smoke, and the check engine light to come on.
Exhaust Emissions
Failures in the injector or high-pressure pump are reported in the 1.5 dCi/OM608 engine family; they cause rough running, power loss, black smoke, and increased fuel consumption.
Fuel System
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.