Second Hand Mercedes-Benz CLA Clutch Slave Cylinder

Only manual-gearbox CLA variants have a clutch slave cylinder — and here is the important catch: the vast majority of CLAs sold in the UK were fitted with Mercedes' 7G-DCT dual-clutch automatic or the later 8-speed torque-converter automatic, with manual gearboxes being extremely rare on this model. If your CLA has an automatic gearbox, it does not have a clutch slave cylinder in the conventional sense, and what you may actually need is a mechatronic unit, a torque converter, or an automatic transmission solenoid — worth discussing with a breaker based on your exact fault.

The CLA ran across two main generations: the C117 (2013–2019, with a facelift around 2016) and the X118 Shooting Brake alongside the C118/A118 generation from 2019 onwards. Engine code is the single most important detail for clutch slave cylinder compatibility, as the hydraulic components follow the engine and gearbox assembly rather than the model year alone. A part from within the same generation sharing the same engine code is the strongest starting point, but whether a pre-facelift or post-facelift unit crosses over should be confirmed with the breaker against your registration.

No — trim levels like Sport, AMG Line, and Executive are cosmetic and equipment packages; they do not change the engine or gearbox hardware, so they have no bearing on clutch slave cylinder fitment. What matters is your engine code, which you can find on your V5C or via a VIN check, not the badge on the boot. Two CLAs with identical engine codes will need the same part regardless of which trim specification they carry.

The C117 generation ran from 2013 to 2019, with a recognised facelift introduced in 2016. Parts sharing the same engine code are often compatible across that facelift boundary, but ancillary and mounting details can change mid-production, so crossing that line should be confirmed with the breaker against your specific registration rather than assumed safe.

The most useful things to provide are your engine code (printed on the V5C or obtainable from a VIN check), your registration number, and confirmation that your car has a manual gearbox — since the vast majority of UK CLAs were automatics and breakers will want to verify this. The engine code tells the breaker far more than the model year or trim name, and supplying it upfront will get you a more accurate quote and reduce the risk of ordering the wrong part.

The clutch hydraulic system has two cylinders — the master cylinder at the pedal end and the slave cylinder at the gearbox end — and symptoms like a spongy pedal, difficulty selecting gears, or fluid loss could point to either one. On many modern Mercedes applications the slave cylinder is a concentric slave cylinder (CSC) mounted inside the bellhousing, which means it comes out with the gearbox and is a more involved job to replace. A breaker can advise on which component you need based on your fault description and engine code, and it is worth establishing this before ordering.