Used Mercedes-Benz SLK Oil Cooler

Only certain SLK engine variants were fitted with an oil cooler from the factory — specifically the higher-output and turbocharged engines such as the AMG variants and some of the more powerful six-cylinder units; many of the smaller four-cylinder naturally aspirated engines did not have one as standard. Before searching for this part, it is worth confirming your exact engine code (found on your V5C or via a VIN check) so you and your breaker can establish whether your specific engine was built with an oil cooler. If your engine was not originally fitted with one, a used oil cooler from another variant will not simply bolt on.

The R170 ran from 1996 to 2004 and the R171 from 2004 to 2011 — these are distinct generations with different engine families, so an oil cooler from an R170 will not be a straightforward swap onto an R171. Even within each generation, fitment is driven primarily by the engine code rather than the generation itself, so you need to match the part to the correct engine code, not just the body shape. Confirm the full engine code with your breaker before purchasing.

The R171 received a facelift around 2008, but for a mechanical component like an oil cooler the engine code is far more relevant than whether the car is pre- or post-facelift. If the engine code is the same across that boundary, the core part is likely compatible, but ancillary fittings and mounting brackets can change mid-production, so you should confirm the exact compatibility against your registration with the breaker rather than assuming a match based on year alone.

Yes, in this case trim level does matter because each trim name corresponds to a different engine, and the oil cooler is matched to the engine code rather than the trim badge. An SLK 55 AMG uses a very different engine to an SLK 200 or SLK 350, so the oil cooler will not be interchangeable between those variants. Always quote your engine code to the breaker — the trim name is a useful starting point but the engine code is what confirms the correct part.

The R172 ran from 2011 onwards and again only certain engines in this generation were factory-fitted with an oil cooler, particularly the AMG and higher-output variants. Supply of used parts depends on how many of those specific engine variants have gone through the breaker network, so availability can vary. Give your breaker your full engine code and registration so they can confirm both whether your car has one and whether they have a matching unit in stock.

For the engine oil cooler itself, gearbox type does not directly affect fitment — the part is matched to the engine code above all else. However, some SLK variants were also fitted with a separate transmission oil cooler for the automatic gearbox, which is an entirely different component, so make sure you and your breaker are clear on which cooler you are looking for. If you are unsure, confirm with the breaker against your registration to ensure you are quoting for the right part.