Mercedes-Benz GLS Heater Matrix Replacement Parts

The GLS has run across two main generations: the first-generation X166 (2016–2019) and the second-generation X167 (2020–present), and heater matrices are not interchangeable across that boundary. If both vehicles are within the same generation, fitment is much more likely, but confirm with the breaker against your registration before buying.

Yes, the Mercedes-Benz GLS is a full-size SUV sold in the UK with a conventional cabin heating system, so it does have a heater matrix fitted as standard across all variants. The engine type — whether petrol, diesel, or hybrid — does not affect whether the vehicle has a heater matrix, as all versions use one.

For the heater matrix specifically, trim level does not affect fitment — the core heating system is the same across GLS trim grades such as AMG Line, AMG Line Premium, and AMG Line Premium Plus. You may notice other interior differences when sourcing parts from a different trim vehicle, but the heater matrix itself should not be one of them — still confirm with the breaker against your registration to be sure.

This is a tricky one because 2019 falls within the first-generation X166 and 2020 is the start of the second-generation X167, meaning these are different-generation vehicles with a significant redesign between them. Heater matrices from across that 2019–2020 boundary are very unlikely to interchange, so confirm with the breaker against both registrations before purchasing.

No — whether your GLS has a petrol, diesel, or mild-hybrid engine, the heater matrix fitment is determined by the vehicle generation rather than the engine fitted. All GLS variants use the same cabin heating system layout within a given generation, so engine type is not something you need to specify when sourcing this part.

Replacing a heater matrix is a significant job on the GLS, typically requiring the dashboard to be partially or fully removed to access the heater box, so it is generally best left to an experienced mechanic or specialist. There are no specific safety-critical concerns with the part itself in the way there are with airbags, but the labour involved means incorrect fitting can lead to coolant leaks inside the cabin, so professional fitting is strongly recommended.