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Used brakes vary between vehicles - and whether you call it used, second hand or a replacement, matching the right one matters. These are the details breakers need to match the right part to your car - our request form asks them so you only hear from suppliers with the correct part:
No – the R129 (1989–2001) and R230 (2001–2012) are entirely different generations with different subframes, suspension geometry, and brake hardware, so parts do not cross over. Always quote the breaker your exact registration so they can pull the right discs, calipers, and pads for your generation.
Yes, engine size matters here – larger-engined SLs such as the 500 and 600 variants typically run bigger brake discs and uprated calipers to cope with the extra weight and power, so they are not directly interchangeable with those from a smaller-engined car like a 300 SL. Always confirm the exact engine variant with the breaker against your registration to make sure you're getting matched hardware.
AMG models such as the SL 55 AMG and SL 63 AMG typically use larger, uprated brake assemblies compared with standard variants, so AMG and non-AMG parts are generally not interchangeable. Stick to the same engine and variant as your own car, and confirm the exact spec with the breaker using your registration number.
The R230 received a facelift around 2006, and while the generation name covers 2001–2012 as a whole, brake specs can differ either side of that boundary – particularly where mid-generation upgrades were applied. Name both the generation and the exact year to the breaker and ask them to check part numbers against your registration before agreeing a sale.
Both sit within the post-facelift phase of the R230 generation (2006–2012), so fitment is more likely than not, but mid-generation brake upgrades can't be ruled out and we can't confirm an exact match here. Give the breaker your full registration so they can cross-reference the part numbers and confirm compatibility before you commit.
Trim level in the traditional cosmetic sense does not affect brake fitment, but on the SL the trim name also reflects the engine variant, and engine size does influence brake specification – so an SL 500 will likely have larger discs and calipers than an SL 350. Tell the breaker your full designation and registration so they can match the correct hardware, and be aware that any aesthetic differences in caliper colour are purely cosmetic and won't affect function.