Used Mercedes-Benz B-Class DPF

The second-generation B-Class W246 ran from 2011 to 2018, with a facelift introduced in 2015 that brought updated engines and revised emissions calibration. Because the facelift coincided with the shift toward Euro 6 compliance, a DPF from a pre-2015 car and one from a post-2015 car may not be interchangeable even if the engine code looks similar on paper. Name the boundary to your breaker and ask them to check the part number against your exact registration before buying.

A 2013 W246 B-Class sits in the pre-facelift, Euro 5 era, while a 2016 car is post-facelift and likely Euro 6 — these are different emissions generations and the DPF specification can differ accordingly. Fitting the wrong-era unit could mean an MOT failure as well as a non-functioning system. Confirm with the breaker by giving them both registrations so they can check part numbers match.

No, trim level does not affect DPF fitment on the B-Class — Sport, AMG Line, and SE all share the same exhaust and emissions hardware for a given engine and model year. You may find minor cosmetic differences around the rear bumper area depending on trim, but the DPF itself is determined by the engine code and emissions era, not the badge. Focus your search on matching the engine code and registration year rather than trim name.

The 2.2-litre diesel B-Class W246 used engine codes from the OM651 family, but the exact suffix on the code can vary by power output and emissions standard. Always read the engine code from your V5C or the engine bay sticker and quote it directly to the breaker, as even small code differences can mean a different DPF specification. This is strong confirm-with-breaker territory, so do not rely on engine displacement alone.

The W245 ran from 2005 to 2011 and is a different generation entirely from the W246 that replaced it in 2011, with different engines, exhaust routing, and emissions systems. A DPF from a W245 will not be a direct fit for a W246 and should not be assumed interchangeable. Stick to sourcing a W246 unit and always cross-reference part numbers with the breaker using your registration.

A used DPF can be good value, but the condition of the filter matters — a heavily clogged or cracked substrate will give the same fault codes as the one you are replacing. Ask the breaker whether the unit came from a car with a known DPF fault, what mileage it covered, and ideally request any available data on its history. Confirm the part number matches your registration before purchase, as fitting a unit from the wrong emissions era can cause failure at MOT.