Used Mercedes-Benz B-Class Flywheel

It depends on the variant. Manual-gearbox B-Class models have a conventional solid flywheel, while those fitted with an automatic or dual-clutch gearbox use a dual-mass flywheel (DMF) instead; both types genuinely exist on this model. If you have an AMT or 7G-DCT automatic, look for a dual-mass flywheel rather than a solid one, and confirm the exact type with the breaker against your registration.

The engine code is the most important detail to get right — the flywheel is machined to suit a specific engine's crank flange, torque output, and gearbox interface, so two B-Class models that look identical can need completely different flywheels. You'll find your engine code on your V5C or by running a VIN check, and it typically appears on a plate or stamp on the engine block itself. Always give the engine code to the breaker rather than relying on the year or trim level alone.

The W245 (first generation, 2005–2011) and W246 (second generation, 2011–2018, with a facelift around 2014) are distinct platforms with different engines, so a flywheel from a W245 will not simply swap across to a W246. Even where engine families appear similar — for example 1.8 diesels — the crank interface, starter ring, and gearbox mating details changed between generations. Match the engine code exactly and confirm compatibility with the breaker before purchasing.

The 2014 W246 facelift brought revised engine and gearbox options on some variants, which can mean a different flywheel even within the same generation. Whether your specific engine code changed at that boundary is something you should confirm with the breaker against your registration, as not every engine variant was updated mid-cycle. Giving the breaker your full engine code and the exact model year removes the guesswork entirely.

No, trim level does not affect flywheel fitment — SE, Sport, and AMG Line are specification packages covering interior, styling, and equipment, not drivetrain differences. What actually determines the correct flywheel is your engine code and gearbox type (manual or automatic), which can be shared across all trim levels. Tell the breaker your engine code and gearbox type and the trim name becomes irrelevant.

Diesel B-Class models, particularly those with automatic or dual-clutch gearboxes, are very commonly fitted with a dual-mass flywheel to smooth out the higher torque pulses of a diesel engine. However, some earlier or manual diesel variants may use a solid flywheel, so fuel type alone isn't quite enough to confirm the exact type. Check your engine code and gearbox type with the breaker, who can identify the correct unit for your specific vehicle.