Used Mercedes-Benz B-Class Clutch Slave Cylinder

Only manual-gearbox variants of the B-Class have a clutch slave cylinder — and in practice, the vast majority of B-Class models sold in the UK came fitted with an automatic or dual-clutch (7G-DCT) gearbox, meaning most examples never had one. If your B-Class has a manual gearbox, a clutch slave cylinder will be present, but you should confirm your gearbox type from your V5 or a VIN check before searching. If your car has an automatic or DCT transmission, this is not a part you need — you may instead be looking for a transmission solenoid, valve body, or mechatronic unit depending on your symptoms.

Yes, the engine code is the most important detail to supply, as it determines the exact gearbox and bellhousing configuration that the slave cylinder must match. The B-Class W245 (2005–2011) and W246 (2012–2018) generations each used a range of engines with different codes, and a cylinder sourced from the wrong engine family may not seat or bleed correctly even if it looks similar. Check your engine code on the V5 or via a VIN check and give it directly to the breaker when requesting a quote. Never rely on engine size alone — two cars both badged B200 can carry different engine codes with different ancillary components.

These are two distinct generations with different platform architectures, so a direct swap between W245 and W246 is very unlikely to work without modification. The W246 moved to a revised drivetrain layout and the hydraulic and mounting geometry of the clutch actuation system changed between generations. Confirm with the breaker against your exact registration and engine code before purchasing any cross-generation part. Do not assume fitment based on the part looking visually similar.

No — trim level has no bearing on clutch slave cylinder fitment on the B-Class. Sport, Urban, SE, AMG Line and similar trim designations describe cosmetic and equipment differences such as alloy wheel style, interior finish, and body styling, none of which affect the clutch hydraulics. What matters is your engine code, fuel type (petrol or diesel), and confirmation that your car has a manual gearbox. Give the breaker your engine code and registration rather than your trim name.

The W246 B-Class received a facelift in 2015, which is a known production boundary. While many mechanical components carried over, ancillary and mounting changes can occur at or around a facelift point and it is not always publicly documented exactly which components were revised. Name the 2015 facelift to your breaker and ask them to confirm compatibility against your specific registration and engine code rather than assuming a pre-facelift or post-facelift part is automatically interchangeable. Providing your full VIN gives the breaker the best chance of matching the correct part.

The single most useful detail is your engine code, which you can find on your V5 logbook or by running a VIN check — it is more precise than the badge or engine size. Also tell the breaker your exact model year, your gearbox type (confirming it is a manual), and your fuel type. Quoting your full registration or VIN allows the breaker to cross-reference their stock accurately and reduces the risk of being sent an incompatible part. Because genuine manual-gearbox B-Class examples are relatively rare in the UK breaker market, being as specific as possible upfront will save time.