Used Mercedes-Benz B-Class Oil Pump

The B-Class W246 generation ran from 2011 to 2018, with a facelift in 2015, so a 2012 and a 2015 car are in the same generation but sit either side of that facelift boundary. Oil pump fitment follows the engine code rather than the model year, so if both cars share the same engine code the pump may well interchange, but whether ancillary or mounting details changed at the 2015 facelift is something you should confirm with the breaker against your registration. Always supply your engine code from your V5 or a VIN check when requesting a quote.

The first-generation B-Class was the W245, produced from 2005 to 2011, while the second generation is the W246, running from 2011 to 2018 — these are entirely different platforms with different engine families. An oil pump from a W245 is very unlikely to suit a W246 because the engine codes differ between generations. Always quote your exact engine code to the breaker to make sure the part matches.

No — trim level has no bearing on oil pump fitment whatsoever. Whether your B-Class is in SE, Sport, AMG Line, or Urban trim, the oil pump is determined entirely by the engine code, not by the trim designation. Focus on supplying your engine code and fuel type when contacting a breaker, and ignore any trim-related details.

Yes, fuel type matters because petrol and diesel engines in the B-Class range have different engine codes and entirely different internal architecture, meaning their oil pumps are not interchangeable. For example, the 1.8-litre diesel engines carry different codes to the 1.6 or 2.0-litre petrol units, and each will have its own specific pump. Always give the breaker your exact engine code — found on your V5 or via a VIN check — rather than just stating petrol or diesel.

For the engine oil pump itself, the gearbox type — whether you have the 6-speed manual or the 7G-DCT dual-clutch automatic — does not normally affect fitment, as the pump is driven by and matched to the engine rather than the transmission. However, if you are sourcing a separate transmission oil pump for the dual-clutch gearbox, that is a distinct part specific to that gearbox type. Confirm which pump you need with the breaker and supply your engine code and gearbox type to avoid any confusion.

The single most important detail is your engine code, which you can find on your V5 registration document or by running a VIN check — this tells the breaker exactly which engine your car has and rules out any guesswork from model year or trim alone. Year and fuel type are useful supporting details, but the engine code is definitive for a mechanical part like an oil pump. Give all of this information to the breaker when requesting a quote, and never rely on model name or badge alone to confirm compatibility.