Used Mercedes-Benz GLS Brake Pedal

Yes, every variant of the Mercedes-Benz GLS has a brake pedal — it is a standard mechanical component present across all engine types, drivetrains, and trim levels of the model. Because the GLS is exclusively available with an automatic gearbox in the UK market, the brake pedal assembly is a two-pedal setup (brake and accelerator only, no clutch). Used examples are readily available from breakers who have dismantled GLS vehicles.

The X166 and X167 are distinct generations with different bodyshells and interior architectures, so the brake pedal assemblies are not a straightforward swap between the two. You should always confirm compatibility against your exact registration with the breaker before purchasing, as pedal box design and fixings differ across these generations. Never assume a part from one generation will drop into the other without verification.

Trim level does not affect brake pedal fitment on the GLS — the pedal assembly is the same regardless of whether the car is standard specification, AMG Line, or any other trim. You may find that pedal covers or surrounds differ cosmetically (for example, AMG Line models often have aluminium-look pedal covers), but the underlying pedal mechanism is identical, so those cosmetic pieces will simply need to be swapped over. Confirm the part number with the breaker against your registration to be certain.

Engine size can influence the wider braking system on the GLS — larger, more powerful variants may have different brake servo and booster setups — and this could in turn affect the pedal assembly and its mounting. For this reason, it is worth confirming with the breaker that the donor vehicle matches your engine specification as closely as possible, not just the generation. Do not assume a pedal from a lower-powered variant will be a guaranteed fit on an AMG or high-output model.

A 2018 GLS falls within the first-generation X166 range (2016–2019), so you should be sourcing a brake pedal from an X166 donor vehicle. Generation is the most important factor for fitment, so make sure any breaker you contact can confirm their donor car is also an X166 and not the newer X167 (2019-onwards). Providing your registration to the breaker is the most reliable way to ensure the right part is identified.

Within the X166 generation, Mercedes-Benz introduced a mid-life update, and whether any changes were made to the pedal assembly or brake booster connection at that point is not something we can state with certainty. This is exactly the kind of mid-generation detail you should confirm directly with the breaker by providing your full registration, so they can cross-reference part numbers from their donor vehicle against your car's specification.