Mercedes-Benz SL Throttle Body Replacement Parts

It depends on the engine. Older petrol SL engines — particularly the naturally aspirated straight-sixes and V8s found in the R107, R129, R230, and early R231 generations — do use a throttle body as part of their fuel and air management systems. However, many later SL engines, especially the turbocharged V8s and V12s fitted to some variants, use alternative air management setups, and diesel SLs do not use a throttle body in the conventional petrol sense. Always confirm your engine code (shown on your V5C or via a VIN check) before searching, as it determines whether your specific SL has a conventional throttle body at all.

Both a 2003 and a 2008 SL fall within the R230 generation, which ran from 2001 to 2011 with a facelift in 2006, but generation alone is not enough to confirm fitment. What matters most is whether both vehicles share the same engine code — for example, a 5.0-litre M113 V8 and a 5.5-litre M273 V8 are both found in R230 SLs but are different engines that will not share the same throttle body. Match the engine codes precisely and confirm cross-year compatibility with the breaker against your registration before purchasing.

The R230 facelift arrived in 2006 and brought various changes, and while the engine code is the primary fitment factor for a throttle body, ancillary and mounting details can sometimes change mid-production around a facelift point. If both cars share the same engine code across that 2006 boundary, fitment is plausible, but you should confirm the specific part reference and mounting configuration with the breaker against your registration to be safe. Do not assume a pre-facelift and post-facelift part are identical without that check.

Trim level as a badge — SL 350, SL 500, SL 55 AMG, SL 63 AMG — directly reflects the engine fitted, so in this case the trim name is actually a useful guide because each badge corresponds to a different engine code. An SL 350 uses a different engine to an SL 500, and both differ from the supercharged M113K in the SL 55 AMG, meaning the throttle bodies are not interchangeable between these variants. Always match on engine code rather than badge alone, as the same engine can occasionally appear under more than one badge, and the engine code is the definitive reference.

The R231 generation replaced the R230 in 2012 and brought a substantially updated engine range, including turbocharged units that may not use a conventional throttle body in the same way as older naturally aspirated engines. Even where both generations share a petrol engine configuration, the engine codes are different between the generations, making cross-generation fitment very unlikely. These are distinct platforms and engine families, so a breaker should be able to confirm immediately that an R231 part will not suit an R230, and you should source from the correct generation.

The throttle body itself can be matched by engine code, which is the most reliable way to ensure the physical part fits. However, whether the unit needs to be coded or paired to your vehicle's ECU after fitting is something you should confirm with the breaker and your fitting garage, as this varies by engine and model year and is not something that can be guaranteed at the point of sale. Some SL throttle bodies require adaptation or coding using diagnostic equipment after installation, so factor that into your plans before buying a used unit.