When buying a used Mercedes-Benz E-Class E300 2014 (207 / 212 / Facelift), the most frequently mentioned issue is oil leaks from the oil cooler/filter housing seals. Additionally, turbo/intake flap sticking is also commonly reported.
Engine varies by trim; verify the engine code on the listing.
Listed from most frequently reported, each with its source.
On the W212 E-Class with the OM642 engine, recurring oil leaks from the oil cooler/oil filter housing seals may occur; this can cause stains under the vehicle, smoke from the engine bay, and a smell of burnt oil.
Engine Bay
The intake manifold of the OM642 engine uses swirl/tumble flaps and control systems; these can stick or break due to carbon deposits or brittle plastic parts.
Engine Bay
A frequently reported issue by E 300 CDI owners is soot and oil buildup in the EGR valve and exhaust gas recirculation pipe. This can lead to EGR valve failures, performance loss, inefficient DPF regenerations, and a smell of fumes.
Exhaust Emissions
The piezo injectors in the 3.0 CDI are sensitive to fuel quality and are expensive to repair or replace if they fail.
Fuel System
In the 3.0 V6 CDI, the variable geometry system (VGT/VNT) of the turbocharger often sticks or loses effectiveness due to soot and dirt buildup; this causes power loss, surging, and the check engine light to come on.
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.