Mercedes-Benz GLS AC Compressor Replacement Parts

These sit in two different generations: the first-generation GLS (X166) ran from 2016 to 2019, while the second-generation GLS (X167) launched for 2020, so a 2017 unit is very unlikely to cross that boundary. Mechanical compatibility is driven primarily by engine code, and the X166 and X167 use different engine families, making a straight swap improbable. Confirm the exact engine code from your V5 or a VIN check and share it with the breaker before ordering.

Both years sit within the first-generation GLS (X166, 2016–2019), so you are within the same generation, which is a good starting point. That said, ancillary brackets and mounting details can change mid-production even within a generation, so confirm the match against your registration with the breaker rather than assuming all X166 years are identical. Your engine code is the single most useful detail to supply when getting a quote.

The 350d is a diesel and the 400 and 500 are petrol variants, and AC compressors are specified to the engine, so these are unlikely to interchange. Trim and badge names like 350d, 400, and 500 tell you the engine family, which is exactly what matters here – stick to diesel-to-diesel or petrol-to-petrol sourcing and match on engine code. Give the breaker your full engine code from the V5 and they can verify whether a specific unit works with your car.

Trim level does not determine AC compressor fitment; it is the engine code, fuel type, and gearbox type that matter, not whether the car is AMG Line, standard, or any other specification. You may find cosmetic or interior differences between trim levels, but the compressor itself is dictated by what is under the bonnet. Focus your search on engine code and year, and the trim name can be set aside entirely for this part.

The X166 GLS received a facelift during its production run, and while both are the same generation, ancillary and mounting changes can occur at facelift points even when the core engine remains similar. Whether a specific pre-facelift compressor fits a facelifted car is something you will need to confirm with the breaker against your registration, as these details are not always publicly documented. Providing your exact engine code and registration gives the breaker the best chance of verifying the match accurately.

The GLS was offered exclusively with automatic transmission in the UK, so in practice you are unlikely to encounter a manual-gearbox donor car in a British breaker's yard. Gearbox type can influence compressor drive and mounting on some vehicles, but since all UK-market GLS models share the same automatic setup, this is not a variable you need to worry about here. Engine code and year remain the details to lead with when contacting a breaker.