Second Hand Mercedes-Benz G-Class Dual Mass Flywheel

Yes, the G-Class has been fitted with dual mass flywheels on its diesel and some petrol manual-gearbox variants across its long production run, which spans from 1979 to the present day, with the current W464 generation introduced in 2018. The dual mass flywheel only applies where a manual gearbox is fitted; G-Class variants paired with an automatic gearbox do not use a dual mass flywheel, as automatics use a torque converter instead. If your G-Class is automatic — which covers the vast majority of UK-market examples — you do not have a dual mass flywheel and should speak to a breaker about the correct torque converter for your vehicle.

The engine code is the single most important detail for sourcing the correct dual mass flywheel, as the part is matched to the engine and gearbox combination rather than the model badge or body style. Diesel engines such as the OM602 and OM606 straight-six units found in older W463 models, and certain later diesel variants, were paired with manual gearboxes and therefore used a dual mass flywheel. You'll find your engine code on your V5C or via a VIN check, and you should supply it to the breaker so they can confirm the correct flywheel rather than relying on year alone.

The W463 ran from 1989 through to 2018, when the substantially revised W464 replaced it, and the two generations differ significantly in their driveline components. The W464 generation in UK specification has been predominantly automatic, making a dual mass flywheel largely irrelevant for that generation; if you have a manual W463 diesel and are sourcing a flywheel from another W463, engine code must match exactly. Do not assume a flywheel crosses the W463-to-W464 boundary without confirming against your registration with the breaker.

Trim and badge names like G300d or G350d reflect engine displacement and output variants, but for flywheel fitment the engine code and gearbox type are what actually matter, not the badge on the tailgate. Two G-Class models with the same engine code and the same manual gearbox will use the same dual mass flywheel regardless of any other trim or specification differences. Always confirm the engine code from your V5C or a VIN check and give this to the breaker rather than relying on the model name alone.

The W463 ran in continuous production from 1989 to 2018, but engine and gearbox specifications changed across that period, including updates to diesel units, so a 2005 and a 2012 car may or may not share the same flywheel even within the same generation. If both vehicles share the identical engine code and gearbox code, fitment is much more likely, but ancillary and mounting changes can occur mid-production without a clear model-year boundary. Confirm both engine codes and gearbox codes with the breaker against your specific registration before purchasing.

A rattling or rumbling noise on cold start that fades once the engine is warm is a well-known symptom of a worn dual mass flywheel on diesel models with manual gearboxes. However, this symptom can also point to other causes, so it is worth having the diagnosis confirmed by a mechanic before ordering a used flywheel from a breaker. When you do source one, give the breaker your full engine code and registration so they can supply the correct unit for your exact specification.