Mercedes-Benz C-Class Clutch Master Cylinder Replacement Parts

Only manual-gearbox C-Class models have a clutch master cylinder — it is the hydraulic component that transfers pedal movement to the clutch slave cylinder and is entirely absent on automatic variants, which make up the majority of C-Class cars sold in the UK. If your C-Class has an automatic gearbox (7G-Tronic, 9G-Tronic, or similar), there is no clutch master cylinder to replace; if you are chasing a fluid leak or pedal issue, you may instead be looking for a brake master cylinder or a gearbox-related component. Confirm your gearbox type before searching — if you have a manual 'box, the part does exist on your car and the guidance below applies.

The W204 (2007–2014) and W205 (2014–2021) are different generations with different engine families, bulkhead layouts, and hydraulic line routing, so a direct swap between the two is very unlikely. The engine code from your V5 or a VIN check is the most useful detail to give a breaker, as the master cylinder follows the engine and gearbox specification rather than just the body shell. Name the boundary to your breaker and ask them to check the part number against your specific registration before buying.

The W204 ran from 2007 to 2014 with a facelift introduced in 2011, and while many mechanical components carried over, ancillary mounting and line-fitting details can change across a facelift year. Give your breaker your engine code and full registration so they can cross-reference part numbers either side of the 2011 boundary — do not assume pre- and post-facelift units are interchangeable without that check.

Trim levels like Classic, Elegance, Sport, and AMG Line on the C-Class are cosmetic and equipment packages — they do not affect the clutch hydraulics at all. What determines fitment is the engine code, fuel type (petrol or diesel), and whether the car has a manual gearbox; two C200 manuals with different trim badges but the same engine code will use the same master cylinder. Focus on the engine code when speaking to a breaker, and ignore the trim name entirely for this part.

The engine code matters more than the badge, but year within a generation can still be relevant because production changes occasionally affect hydraulic components even within the same engine family. A C220d manual from early in the W205 generation (2014 onwards) may not be identical to one from later in the same run, so always give the breaker your exact engine code (found on the V5 or via a VIN check) and your registration to allow them to match the part accurately. Never assume any C220d unit is a guaranteed fit without that cross-reference.

Body style does not affect clutch hydraulics — the master cylinder is determined by the engine code and gearbox type, not whether the car is a saloon or estate. A W205 saloon and an S205 estate sharing the same engine code and manual gearbox will use the same master cylinder, so do not limit your search by body style when contacting breakers, as you may unnecessarily reduce your options.