Used Mercedes-Benz GLS Wiper Motor

The Mercedes-Benz GLS has two main generations: the first-generation X166, produced from 2016 to 2019, and the second-generation X167, which launched in 2019 and is still in production. Generation is the key factor for wiper motor fitment, as the front wiper motor assembly differs between X166 and X167. When searching for a used motor, confirm with the breaker that the donor vehicle shares your generation (X166 or X167) to ensure compatibility.

A 2017 GLS is an X166 and a 2020 GLS is an X167, so these sit on opposite sides of the generation boundary that falls in 2019. Because the two generations differ in body structure and motor fitment, a straight swap across this boundary is unlikely, but confirm with the breaker against your registration before ruling it out entirely. Stick to sourcing an X166 motor for a 2017 car and an X167 motor for a 2020 car as your safest starting point.

Yes, front and rear wiper motors are entirely different units with different fixings, connectors, and output specifications, so you must specify which one you need when contacting a breaker. Make sure the donor vehicle is the same generation as yours (X166 or X167) and that the breaker is supplying the correct front or rear unit. Mixing the two up is a common mistake, so double-check the part location before agreeing a quote.

Trim level does not affect wiper motor fitment on the GLS — whether your car is a base AMG Line, AMG Line Premium, or AMG Line Premium Plus, the motor itself is the same within a generation. You may find that donor vehicles at different trim levels had slightly different wiper blade styles or finishers cosmetically, but the motor unit underneath is interchangeable within the same generation. Focus your search on matching the generation (X166 or X167) rather than worrying about trim.

The GLS (X166) is closely related to the GL (X166) and shares significant platform overlap, so there is a reasonable chance of motor compatibility, but this is not guaranteed and varies by exact build date and specification. The GLE uses a different platform and is less likely to be a direct fit. Rather than assuming compatibility, give the breaker your GLS registration and ask them to verify the part number against the donor vehicle before purchasing.

No, the engine fitted to your GLS has no bearing on wiper motor fitment whatsoever — the motor is part of the body electrical system and is the same regardless of whether your car is a diesel, petrol, or hybrid variant. The factors that matter are the generation (X166 or X167) and whether you need the front or rear motor. Confirm those two details with the breaker and you can ignore engine size entirely.