Second Hand Mercedes-Benz CLS Clutch Master Cylinder

No — the Mercedes-Benz CLS has never been offered with a manual gearbox in any variant across any of its generations, so it has never been fitted with a clutch master cylinder at all. Every CLS sold in the UK came with an automatic transmission, whether the 7G-Tronic, 9G-Tronic, or earlier five-speed units, none of which use a clutch master cylinder. If you are chasing a hydraulic leak or a pedal-related fault, the part you are most likely looking for is a brake master cylinder, which does exist on the CLS and is a common replacement item. A breaker can help you identify the correct brake master cylinder for your registration.

Because the CLS is automatic-only, the master cylinder on your car is a brake master cylinder, not a clutch master cylinder — there is no clutch pedal or clutch hydraulics on any CLS variant. Brake master cylinders do vary across the CLS generations — the first-generation W219 (2004–2010) and the second-generation C218 (2011–2018, facelifted 2014) and C257 (2018 onwards) each have different units — so your engine code and year are the key details to give a breaker. Do not order a clutch master cylinder for this vehicle as that part simply does not exist on it.

This question does not apply to the CLS, because no variant of the CLS was ever built with a clutch or clutch hydraulics, so there is no application for a clutch master cylinder on this car regardless of what other Mercedes models may have used. If another Mercedes with a manual gearbox is what you are actually working on, engine code and gearbox type will be the critical fitment details for that vehicle. For the CLS specifically, please search for a brake master cylinder instead and supply your registration or VIN to the breaker.

Almost certainly not for a CLS — those listings are likely the result of broad search algorithms returning clutch master cylinders from other Mercedes models or from unrelated vehicles, and none of them would be applicable to a CLS which has never had a manual gearbox. It is a common marketplace issue where part-name searches pull in loosely matched stock. The part you need for any hydraulic or pedal fault on a CLS is almost certainly a brake master cylinder, and you should search specifically for that, quoting your registration to any breaker so they can confirm the correct unit for your engine and year.

No variant of the CLS — whether diesel, petrol, mild hybrid, or AMG — has ever been fitted with a manual gearbox, so engine code and badge make no difference here because a clutch master cylinder does not exist on any of them. The engine code is normally the most important detail for mechanical parts fitment, but in this case the question is moot as the part itself is not present on the vehicle. If you are sourcing a brake master cylinder, which is the correct part to be looking for, then engine code and generation do become relevant and your breaker will need your registration or VIN to confirm the right item.