Cheap Mercedes-Benz SL Differential

No, the R230 (2001–2012) and R231 (2012–2020) are distinct generations with different subframes, axle geometry, and differential housings, so they are not interchangeable. Always confirm against your registration with the breaker before purchasing.

Both years sit within the R230 generation (2001–2012), which received a facelift in 2006, so the generation name is the same but confirm with the breaker whether any mounting or ancillary changes occurred around that facelift year, as these can affect direct swap compatibility. Your engine code — found on your V5 or via a VIN check — is the most reliable detail to give the breaker so they can match the correct unit.

Trim level itself does not determine differential fitment; what matters is the engine code, fuel type, gearbox type (automatic or manual), and year within the generation. The SL350 and SL500 use different engines and may use different final-drive ratios, so they are unlikely to be a straight swap — share your engine code with the breaker rather than relying on the badge alone.

Both 2013 and 2015 fall within the R231 generation (2012–2020), which makes a match more plausible, but the engine code is the key detail because different R231 engines can use different differential specifications. Give the breaker your engine code from the V5 or a VIN check and confirm any ancillary or mounting differences against your registration before buying.

Yes, gearbox type directly affects which differential you need because torque delivery and output shaft specifications can differ between transmission types. Always tell the breaker your gearbox type alongside your engine code to avoid sourcing an incompatible unit.

This is something you must confirm with the breaker against your specific registration, as ECU pairing and any immobiliser-related coding requirements vary and cannot be stated as fact here. Ask the breaker and your fitting garage about this before completing the purchase.