Mercedes-Benz B-Class Fuel Injector Replacement Parts

Yes, all variants of the Mercedes-Benz B-Class use fuel injectors, because every engine offered in the B-Class range — whether petrol or diesel — uses either direct or indirect fuel injection rather than a carburettor. Petrol models use petrol direct injection (GDI/CGI), while diesel models use common-rail diesel injectors, and these are entirely different parts that will not interchange. Always confirm your fuel type before searching.

The W245 (first-generation B-Class, 2005–2011) and the W246 (second-generation B-Class, 2011–2018) are completely different platforms with different engine families, so a direct swap across this generation boundary is very unlikely. Even where an engine code appears similar, ancillary fittings and rail connections can differ between generations. Confirm your exact engine code — found on your V5 or via a VIN check — with the breaker before ordering.

The W246 ran from 2011 to 2018 with a facelift arriving in 2014, and while the engine codes often carried across the facelift, injector specifications can vary mid-production even within a generation. The engine code is the most reliable guide here — if both cars share the same engine code, fitment is much more likely, but confirm this with the breaker against your registration to be sure. Do not rely on build year alone.

Trim level — whether SE, Sport, Urban, or any other — has no effect on fuel injector fitment; what matters is the engine code, not the badge on the back of the car. A B180 Sport and a B180 SE with the same engine code will use the same injector. Focus on supplying the breaker with your engine code rather than your trim name.

The B200 CDI and B220 CDI in the W246 generation can use related engine families, but the B220 CDI typically produces more power, which may mean different injector flow rates or a different part number even if the physical fitment looks similar. Your engine code (stamped on the block and listed on your V5 or via a HPI/VIN check) will tell the breaker exactly which injector you need. Do not assume diesel injectors are interchangeable between different output variants without confirming the engine code.

Modern Mercedes-Benz common-rail diesel systems and direct-injection petrol systems can require injector coding so the ECU knows the precise flow calibration of each injector — this is something to confirm with the breaker and your fitting garage rather than assume either way. A used injector may come with or without its original coding data, and whether recoding is needed depends on your specific engine management system. Make sure you discuss this with whoever is fitting the injector before you buy.