Cheap Mercedes-Benz SLK Throttle Body

It depends on the engine: petrol-engined SLKs do have a throttle body, but diesel SLKs never existed, so this is a petrol-only question. Naturally aspirated petrol variants (such as the SLK200 and SLK350) use a conventional electronic throttle body, while supercharged variants like the SLK200 Kompressor also use one, positioned in the intake tract. If you have an SLK, check your V5 or run a VIN check to confirm your exact engine code before searching, as the throttle body design varies between engine families.

The SLK runs across three main generations: the R170 (1996–2004), the R171 (2004–2011, with a facelift around 2008), and the R172 (2011–2016). Each generation used substantially different engine families, which means the throttle body is unlikely to carry across generation boundaries — an R170 unit will not suit an R171 or R172. Always match by engine code first, and confirm cross-generation compatibility with the breaker against your registration.

Both years sit within the R171 generation, but the facelift arrived around 2008 and brought some engine and ancillary revisions, so a 2007 and 2009 car could have subtle differences even if the engine code looks the same on paper. The engine code is the key check here — if both cars share the same code, fitment is likely, but mounting or ancillary changes around the facelift period mean you should confirm the specific part number with the breaker against your registration before buying.

In this case the badge does matter, because SLK200, SLK280, and SLK350 denote different engine variants, not just trim levels, and each engine has its own throttle body specification. What does not matter is any cosmetic or equipment trim distinction within the same engine variant — two SLK350s with different interior or tech packs will need the same throttle body. Always supply the engine code (found on the V5 or via a VIN check) to the breaker, as this is more reliable than the badge alone.

These are different engines from different generations — the SLK250 sits in the R172 and uses a turbocharged 1.8-litre unit, while the SLK200 Kompressor in the R171 is a supercharged engine, and the two are not compatible. Even where engine displacements look similar, the throttle body design, diameter, and electronic connections differ between these engine families. Get your engine code from the V5 and provide it to the breaker so they can match the correct unit.

This is something you should confirm directly with the breaker or your Mercedes specialist, as ECU pairing and immobiliser interaction can vary and we cannot state this as fact for a specific vehicle. Some Mercedes throttle bodies require adaptation or basic settings to be run via diagnostic equipment after fitting, and this may involve dealer or specialist tools. Ask the breaker whether the unit they supply has any known coding requirements, and factor in the cost of any adaptation work when budgeting.