Mercedes-Benz GLS Seat Replacement Parts

The Mercedes-Benz GLS (X166) ran from 2016 to 2019 in the UK, so a 2018 seat and a 2016 seat are from the same generation and should be compatible in principle. That said, whether the specific part swaps cleanly across the model year depends on trim level and any mid-cycle running changes, so confirm the exact donor vehicle details with the breaker against your registration before buying. Seat style and upholstery can vary between trim grades even within the same generation.

The GLS name was introduced in 2016 when Mercedes rebranded the GL-Class (X166 generation), but the underlying platform carried over, meaning some interior parts may be interchangeable between late GL-Class and early GLS models. However, this is a genuine generation boundary and fitment across it is not guaranteed, so you should confirm compatibility with the breaker using both registrations before committing. Do not assume the swap works without that check.

Yes, trim level matters for GLS seats because upholstery, side bolstering, and seat functions differ across grades such as SE Line and AMG Line — for example, AMG Line models typically feature sportier, more heavily bolstered seats with different stitching and materials. You need a seat from a matching or equivalent trim level to get a like-for-like result; a seat from a different grade will likely fit physically but will look noticeably different to the rest of the interior. Tell the breaker your trim level as well as your registration so they can match the donor vehicle appropriately.

Yes, GLS seats are handed — the nearside (NS, passenger) and offside (OS, driver) seats are not interchangeable because the side bolsters, seat-base mechanisms, and any integrated seat-belt pretensioner or side airbag are specific to each side. Always tell the breaker which side you need when requesting a quote. Seat-mounted side airbags and pretensioners are safety-critical, single-use after deployment, and we strongly recommend professional installation for any seat containing these components.

GLS seats frequently contain side-impact airbags and seat-belt pretensioners built into the seat structure, both of which are safety-critical and single-use after deployment — a seat from a written-off vehicle where airbags have fired must not be reused. You should confirm with the breaker that the airbag module is intact and undeployed, and ask them to check pretensioner compatibility with your specific SRS system against your registration, as variants can differ. Professional fitting by a qualified technician is strongly recommended for any seat containing these components.

The GLS moved to the second generation (X167) from 2020 onwards, so a 2019 seat (X166) and a 2020 seat (X167) are from different generations and are very unlikely to interchange directly. This is a firm generation boundary and we would not expect cross-generation fitment to work, but confirm with a breaker who can check both donor and recipient vehicles against their parts data. Buying within the correct X167 generation is the right starting point for a 2020 or later GLS.