Second Hand Mercedes-Benz CLA Seat Belt

The CLA runs across two main generations: the first generation (C117) from 2013 to 2019, and the second generation (C118) from 2019 onwards. Seat belts are generally generation-specific, so a belt from a 2015 car should suit other C117 models, and a belt from a 2020 car should suit other C118 models. Always confirm the exact part against your registration with the breaker before buying.

2018 falls within the first-generation C117 (2013–2019), while 2020 sits in the second-generation C118 (2019 onwards), so these are different generations with different interior architectures. It is unlikely a belt from the older car will cross over to the newer one, and we would not recommend assuming compatibility across that generational boundary. Check with the breaker quoting against your specific registration to be certain.

Trim level can matter for the CLA because higher trims such as AMG Line may feature sport seats with integrated or differently routed belt guides compared to SE models, which could affect the belt anchorage points or pretensioner setup. If your car has standard seats, a belt from another standard-seat CLA of the same generation is likely compatible, but if you have sports or AMG-style seats the fitment picture is less straightforward. Confirm the trim and seat type with the breaker against your registration before purchasing.

Yes, seat belts are side-specific — the nearside (NS) is the passenger side and the offside (OS) is the driver's side, and they are not interchangeable. When contacting a breaker, always specify NS or OS along with whether it is a front or rear belt, as rear belts may also vary by seating position. Getting the side wrong means the belt will not locate correctly, so be precise when requesting a quote.

CLA seat belts are pretensioner units, which makes them safety-critical components — pretensioners are single-use devices that deploy in a collision, so any belt from a car that has been in an accident where the pretensioner fired cannot be reused. We strongly recommend professional fitting by a qualified technician to ensure the belt is correctly anchored and the pretensioner is properly integrated with the car's SRS system. For the specific pretensioner variant compatible with your car's SRS system, confirm with the breaker against your registration rather than assuming any same-generation unit will work.

The C117 first generation received a facelift in 2016, though interior changes were relatively minor and seat belt compatibility may not have changed across that facelift date. That said, we cannot state with certainty that a pre-2016 belt will definitely interchange with a post-2016 unit, so this is exactly the kind of cross-boundary question to put to the breaker with your registration to hand. They can check the part numbers against your specific car before you commit to buying.