Second Hand Mercedes-Benz B-Class Oil Cooler

Yes, the B-Class does have an oil cooler on many of its engine variants, particularly the diesel and turbocharged petrol engines where thermal management is more critical. Naturally aspirated petrol variants may use a simpler or absent oil cooling arrangement, so the part does not exist universally across every B-Class engine. The safest starting point is to confirm your engine code — found on your V5C or via a VIN check — before searching, as this determines whether your specific car has one and what form it takes.

Almost certainly not — the W245 (first generation, 2005–2011) and the W246 (second generation, 2011–2018, with a facelift around 2014) are entirely different platforms with different engine families, so the oil cooler designs do not carry over between them. Even where the fuel type is the same — say, both diesel — the engine codes differ across generations, and the oil cooler is engineered to that specific engine. Always supply your engine code to the breaker so they can match the part to the correct application.

Both years fall within the W246 generation, but the 2014 facelift brought some engineering changes, and ancillary components including cooler routing and mounting can differ mid-production. The engine code is the critical detail here: if both cars share the same engine code, compatibility is much more likely, but you should confirm the specific part number against your registration with the breaker rather than relying on year alone.

Trim level does not affect oil cooler fitment — the oil cooler follows the engine, not the badge or interior specification. A B 200 CDI in SE trim and a B 200 CDI in AMG Line trim will use the same oil cooler provided the engine code matches. Focus on the engine code rather than the trim name when sourcing from a breaker.

For the engine oil cooler itself, gearbox type typically does not matter — the cooler serves the engine and is determined by the engine code. However, if your car has an automatic gearbox it may also have a separate transmission oil cooler, which is a different part entirely, so make sure you are clear with the breaker about which cooler you need. Quoting your engine code and confirming whether you want the engine or transmission cooler will help avoid any confusion.

Fuel type directly influences which oil cooler is fitted, so a diesel engine oil cooler and a petrol engine oil cooler are not interchangeable even within the same generation. The engine codes for diesel and petrol variants are different, and the coolers are matched to those specific engines. Always provide your exact engine code to the breaker — this single detail will allow them to confirm whether a donor part is compatible with your car.