Used Mercedes-Benz GLS Subframe

The GLS nameplate began with the X166 generation (2016–2019), which was essentially a rebadged GL-Class facelift, followed by the all-new X167 generation from 2020 onwards. Within the same generation, subframes are generally a strong match, but confirm the exact part number with the breaker against your registration before buying, as running-gear updates can occur mid-generation without a visible facelift.

The X166 (2016–2019) and X167 (2020-on) are entirely different platforms with different dimensions and mounting geometry, so a subframe from one will not fit the other. Always source from the correct generation and confirm with the breaker using your registration number to make absolutely sure.

For a subframe itself the basic structure is typically shared across the range within a generation, but Mercedes does tune suspension and bracing components around heavier, more powerful engines, so it is worth checking whether the part number matches your engine variant. Give the breaker your full registration or VIN so they can verify the correct spec rather than assuming any GLS subframe will do.

Trim level alone, such as AMG Line versus a standard GLS, does not change the subframe itself, so you do not need to seek out a specific trim-level donor car. Be aware that AMG Line or AMG 63 variants may sit on sport-tuned suspension components that attach to the subframe, but the subframe casting is not a trim-specific part — confirm the part number with the breaker against your registration to be certain.

This crosses the generation boundary between the X166 (ending 2019) and the X167 (from 2020), which are different platforms, so fitment is extremely unlikely. Treat these as non-interchangeable and confirm with a breaker who can check both part numbers against your registration before you commit to a purchase.

Running gear on large SUVs like the GLS can vary with engine weight and output, meaning heavier or more powerful variants sometimes have uprated subframe reinforcement or different mounting points compared with smaller-engined cars. It is worth giving the breaker your exact engine code as well as your registration so they can match the correct part, rather than assuming all GLS subframes within a generation are identical.