Used Mercedes-Benz SL Gearbox

The Mercedes SL has run across several distinct generations: the R107 (1971–1989), R129 (1989–2001), R230 (2001–2012, facelifted 2008), and R231 (2012–2020), and these generations do not share gearboxes with one another. Even within a generation, fitment is driven primarily by engine code rather than the model year badge, so a gearbox that suits one engine variant will not necessarily suit another even from the same year. Always supply your engine code – found on your V5C or via a VIN check – when getting quotes from a breaker, as this is the single most reliable way to identify a compatible unit.

The R230 generation ran from 2001 to 2012 with a notable facelift in 2008, and while cars on either side of that boundary share the same basic platform, ancillary and mounting changes can occur mid-production that affect whether a gearbox will drop straight in. Name the facelift year to your breaker and confirm against your specific registration, as crossing that 2008 boundary is something they will need to verify part-by-part rather than assume.

No – the SL350 and SL500 use different engines (a V6 and a V8 respectively) and their gearboxes are matched to those engines, so they are not interchangeable. Engine code is what matters here, not the SL badge or trim level, and fitting a gearbox from a different engine family is not a swap a breaker would recommend. Always quote your exact engine code when asking for a gearbox to make sure you get a unit from the correct engine variant.

Trim level does not affect gearbox fitment on the SL – what matters is the engine code, fuel type, and gearbox type (automatic or manual), not whether the car is a standard specification or a higher-line variant. You may find cosmetic or interior differences between cars you are looking at for donor parts, but those have no bearing on whether the gearbox will be mechanically compatible with yours. Focus on matching engine codes when speaking to a breaker rather than trim designations.

Whether the replacement gearbox or its associated control units will need to be paired or coded to your specific vehicle is something you must confirm with your breaker and the fitting garage rather than assume either way. Mercedes-Benz vehicles can involve immobiliser and ECU considerations that vary by model year and specification, and this is not something a parts listing alone can confirm. Raise this before purchase so you can factor any coding work into your decision.

No – diesel and petrol gearboxes are matched to their respective engines and are not interchangeable, even if the cars share a model year and generation. The engine code will confirm the fuel type and the exact gearbox specification your car needs, and a breaker will use this to source a compatible unit. Make sure you supply the correct fuel type and engine code together when requesting quotes.