Mercedes-Benz B-Class Dual Mass Flywheel Replacement Parts

Yes, the B-Class does use a dual mass flywheel (DMF), but only on manual gearbox variants — automatics use a torque converter instead and do not have a flywheel at all. Both diesel and petrol manual-transmission B-Class models can be fitted with a DMF, so the first thing to confirm is whether your car has a manual gearbox before sourcing this part.

These are two completely separate generations — the W245 ran from 2005 to 2011 and the W246 from 2011 to 2018 — and the engine families changed significantly between them, so a DMF from one generation will not generally cross to the other. Your engine code is the critical detail here; confirm the exact code from your V5 or a VIN check and supply it to the breaker so they can match the flywheel precisely. Never assume a part crosses a generation boundary without the breaker verifying it against your registration.

Trim level makes no difference whatsoever to DMF fitment — Sport, SE, AMG Line and Urban are all cosmetic and equipment packages that do not alter the engine or gearbox configuration. What matters entirely is your engine code, fuel type (diesel or petrol), and that your car has a manual gearbox. Give the breaker your engine code rather than your trim name and you will get a far more useful answer.

The W246 was facelifted in 2014, and while the broad engine family continued, there were running production changes that may affect ancillary components and mounting details on the DMF. Name the generation boundary to the breaker — pre-facelift 2011–2014 versus post-facelift 2015–2018 — and ask them to confirm compatibility against your specific registration, as this is something that must be verified rather than assumed.

Yes — engine code is the single most important detail, above year or even fuel type badge, because Mercedes used different engine variants within the same model year and the DMF is matched to the specific engine. The code is stamped on the engine block and also appears on your V5 logbook or can be retrieved via a VIN check; supply this to the breaker alongside your gearbox type (manual) and they can identify the correct unit. Relying on year alone risks ordering an incompatible part.

No — automatic gearbox variants of the B-Class use a torque converter in place of a clutch and flywheel assembly, so there is no dual mass flywheel to replace. If your automatic is suffering from vibration, shudder or drivetrain noise, the fault is more likely to lie with the torque converter, transmission mounts, or another drivetrain component — a specialist or breaker who knows automatics will be able to point you in the right direction.