Used Mercedes-Benz SL Oil Pump

Every petrol and diesel engine fitted to the Mercedes-Benz SL range requires a mechanically driven oil pump to pressurise the lubrication system, so yes, all variants across all generations carry one. The pump design and fitment points vary significantly between engine families, so the specific unit you need depends entirely on which engine your car has rather than simply which generation of SL it is. Check your V5 or run a VIN check to find your exact engine code before searching.

No — the R107 SL (produced 1971–1989) and the R129 SL (1989–2001) use entirely different engine families with different block architectures, so the oil pumps are not interchangeable between these generations. Even where both cars carried a similarly badged engine such as a 3.0 or 5.0 litre unit, the internal dimensions and pump drive arrangements differ across that generation boundary. Always match the pump to your exact engine code rather than the displacement or badge.

Both years fall within the R230 generation (2001–2011), which received a facelift around 2006, but whether the oil pump crosses that facelift boundary depends on your specific engine code. The M113 V8, M272 V6, M273 V8, and AMG M156 and M155 units fitted across R230 production each have their own pump design, so two R230 cars of different years can need different pumps if they carry different engines. Confirm the engine code on both donor and recipient vehicles and check with the breaker before buying.

Trim and badge level do not directly determine oil pump fitment; what matters is the engine code underneath. An SL 350 carries a different engine to an SL 500 or an SL 55 AMG, so those three cars will need different pumps — but that difference is down to the engine family, not the trim designation itself. Give the breaker your engine code (found on the V5 or a VIN check) rather than just the badge, and the trim name becomes irrelevant to the search.

Where a donor vehicle from another Mercedes-Benz model carries an identical engine code to your SL, the internal oil pump components are generally from the same engine family and may well be compatible. However, ancillary mounting brackets and pickup pipe lengths can vary depending on the sump design used in a particular model, so this is worth confirming with the breaker against your specific registration rather than assuming a straight swap. Quote both engine codes and ask the breaker to cross-reference before purchasing.

A used oil pump from a reputable breaker can be a cost-effective solution, particularly given the price of new units for the larger AMG and V8 engines in the SL range. Inspect the pump for wear on the rotors or gears and check that the pressure relief valve moves freely, as a worn pump can cause low oil pressure warnings and serious engine damage if fitted. Your fitting workshop should prime the pump and verify oil pressure readings after installation, and confirm with the breaker that the unit came from a vehicle with a matching engine code to yours.