Used Mercedes-Benz GLS Radiator

The GLS runs across two main generations: the first-generation X166 (2016–2019) and the second-generation X167 (2019 onwards), with the X167 being a ground-up redesign rather than a facelift. Radiators are not straightforwardly interchangeable between these two generations, so always confirm with the breaker against your registration before ordering. The engine code on your V5 or a VIN check is the most reliable detail to supply.

A 2017 GLS is the first-generation X166 platform, while a 2020 GLS is the second-generation X167, so these are entirely different vehicles and the radiators are very unlikely to be interchangeable. Treat them as separate parts entirely and confirm with a breaker using your exact registration or engine code. Supplying your engine code gives the breaker the clearest possible basis to check compatibility.

Yes, engine specification is the primary factor for radiator fitment on the GLS — a 3.0-litre diesel 350d or 400d will have different cooling requirements and potentially different radiator dimensions compared to a petrol V8 580. Always quote your engine code (found on your V5 or via a VIN check) to the breaker rather than relying on the badged name alone, as coding can vary even within the same badge across production years. Never assume a radiator from a different engine variant will fit without confirmation.

Trim level — whether AMG Line, Executive, or any other specification — does not affect radiator fitment; it is a cosmetic and equipment distinction rather than a mechanical one. The radiator is determined by engine code, fuel type, and gearbox, so an AMG Line and a standard GLS with the same engine will use the same radiator. Do bear in mind that breakers may describe parts from higher-spec cars at a premium, but the underlying part should be the same where the engine matches.

The earlier GL-Class (X164 and X166) shares its platform ancestry with the GLS X166, which was essentially a renamed GL-Class from 2016, so there may be overlap between late GL-Class X166 and GLS X166 radiators — but confirm this with the breaker against your specific engine code and registration rather than assuming. The X167 GLS introduced from 2019 is a wholly new generation and should not be assumed to share parts with any GL-Class. Your engine code is the safest starting point for any cross-model compatibility check.

Gearbox type can influence cooling system configuration on some vehicles, so it is worth mentioning your gearbox type to the breaker alongside your engine code when sourcing a used radiator. In practice the main radiator core is often the same unit, but ancillary connections for transmission oil cooling can differ, and whether those apply to your specific build is best confirmed with the breaker against your registration. Never assume compatibility across different drivetrain configurations without that check.