Second Hand Mercedes-Benz GLS Fuse Box

The GLS has run across two main generations — the first-generation X166, produced from 2016 to 2019, and the second-generation X167, which launched in 2020 onwards — and fuse boxes are generally generation-specific due to differences in wiring architecture and module layout. A fuse box from within the same generation is more likely to be compatible, but crossing from the X166 to the X167 is a significant boundary and you should confirm with the breaker whether the part from their donor vehicle matches your registration before buying. Never assume fitment based on model name alone.

The GLS has been offered with a range of petrol and diesel engines, and the fuse box can vary between engine variants because each powertrain has different electrical demands and circuit requirements. Unlike alloy wheels, where engine choice is irrelevant, fuse boxes are closely tied to the specific engine and equipment level of the donor vehicle. Always give the breaker your full registration so they can check the part against the correct build specification.

The GLS has been sold in trim levels including AMG Line, AMG Line Premium, and AMG Line Premium Plus in the UK, and while trim itself does not fundamentally change the fuse box, higher trims often include additional features such as advanced driver aids, upgraded audio, or comfort packages that add circuits to the fuse box. This means a fuse box from a lower-spec donor may be missing circuits your car needs, or vice versa. Confirm with the breaker that the donor vehicle's specification closely matches your own, particularly if your GLS has optional extras fitted.

Yes, all variants of the Mercedes-Benz GLS are fitted with a fuse box — this is a standard component across every engine and trim on this model. The GLS typically has more than one fuse and relay box, commonly located in the engine bay and in the passenger footwell or boot area, so when sourcing a used fuse box make sure you and the breaker are clear on which specific unit you need. Providing your registration to the breaker will help them identify the correct part from their dismantled donor vehicle.

The X167-generation GLS received a mid-life update, and while Mercedes-Benz has made incremental changes to specification over the production run, whether a fuse box crosses a facelift boundary cleanly depends on what changed electronically at that point. Naming an exact facelift year for the X167 with full confidence is something we'd caution against without verifying against Mercedes build records, so we'd recommend confirming with the breaker whether their donor vehicle's year and specification matches yours before proceeding. This is especially important if your car has features like the MBUX infotainment system or updated driver assistance tech that may affect the fuse layout.

When contacting a breaker on Findapart, give them your full registration number, specify which fuse box location you need (engine bay, interior, or boot), and mention any significant optional extras on your car such as towing electrics, panoramic roof, or advanced driver assistance systems, as these can affect the fuse box specification. The breaker will use this to match the donor vehicle as closely as possible to your own build. The more detail you provide upfront, the better your chances of getting a compatible unit.