The most frequently mentioned issue when buying a used 2021 Mercedes-Benz GLE 350d (167): SCR/AdBlue system and NOx sensor faults. Additionally, DPF clogging and incomplete regenerations 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 complex SCR (AdBlue dosing) system and related NOx sensors can cause errors or faults in the 2.0 diesel version: dosing errors, out-of-tolerance sensors, or urea injector nozzle failures may trigger dashboard warning lights, power limitations, or require intervention.
Exhaust Emissions
In the 2.0 diesel OM654 engine of the 300 d (269 HP) version, DPF clogging can occur, especially with city driving and short trips. Passive regenerations often fail, and forced regeneration or professional cleaning may be required.
Exhaust Emissions
The EGR valve and actuators in the 2.0 OM654 engine can accumulate soot and carbon deposits, leading to faults, check engine light illumination, and performance loss. In some cases, mechanical actuators fail or stick, requiring deep cleaning or replacement.
Exhaust Emissions
In the 2.0 OM654 engine, issues with the injection system, including piezo injectors and the high-pressure network, have been reported. Symptoms include rough running and power loss; the pump or injectors may require intervention. These components are sensitive to fuel quality.
Fuel System
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.