Mercedes-Benz SL Crankshaft Replacement Parts

The Mercedes-Benz SL (R230 generation, 2001–2012) spans a long production run, but crankshaft fitment is determined by engine code first, not by year alone. If both cars share the same engine code — for example both are M113 V8s or both are M275 V12s — there is a reasonable chance the crankshaft will interchange within the R230 generation, but you must confirm this with the breaker against your exact registration and engine code, as running changes can affect internal components mid-production. Your engine code is on your V5C or can be retrieved via a VIN check.

The R129 (1989–2001) and R230 (2001–2012) are entirely different generations with different engine families, so a crankshaft from an R129 will not cross over to an R230 even if the badge says the same displacement. Engine codes differ between the two generations — for instance the R129's M119 V8 is not the same unit as the R230's M113 — and internal dimensions will not match. Always match by engine code, not by generation badge or badge displacement.

Yes — the crankshaft is a core internal engine component machined specifically to the dimensions of that engine family, so the engine code is the single most useful detail you can supply to a breaker. Two SLs from the same year can carry completely different engines — the SL500 uses a V8 while the SL600 uses a V12, and their crankshafts are entirely different parts. Find your engine code on the V5C or via a VIN check before approaching any breaker, as it will save time and avoid an expensive mistake.

No — trim level does not affect the crankshaft at all, because it is an internal engine component and Sport or other trim designations only alter cosmetic and suspension specifications, not the engine internals. An SL350 Sport and a standard SL350 sharing the same engine code will use the same crankshaft. What matters is that the engine code matches between donor and recipient vehicle, so confirm that with the breaker.

The crankshaft itself is an internal engine part and is not directly interchangeable with the gearbox, so a different gearbox type alone does not change which crankshaft the engine uses. However, you should still tell the breaker your gearbox type when enquiring, as it helps them identify the correct donor vehicle and flag any ancillary differences that may have accompanied different drivetrain configurations. The engine code remains the primary matching factor.

Both years fall within the R230 generation (2001–2012), which is encouraging, but the R230 received various engine updates across its production life and 2001 early-build engines may differ internally from 2009 examples even under the same engine code designation. Name the boundary confidently: the R230 generation runs from 2001 to 2012 with a facelift in 2008, and crossing that facelift boundary is exactly the situation you should confirm with the breaker against both registrations and engine codes before purchasing. Do not assume fitment based on generation alone.