Used Mercedes-Benz GLS Rear Light

The GLS has two clear generations: the first-generation X166, produced from 2016 to 2019, and the second-generation X167, which launched in 2020 and remains current. Rear lights are generation-specific and will not interchange between the X166 and X167 as the body and light clusters are completely different designs. Always match the part to your generation first.

Both 2017 and 2019 GLS models are first-generation X166 cars, so they share the same rear light design and a used unit from either year should be compatible. That said, confirm with the breaker using your exact registration, as mid-generation pressing or cluster changes can sometimes affect fitment even within the same generation.

No — 2020 marks the start of the second-generation X167 GLS, while 2018 is the first-generation X166, and these two generations have entirely different rear bodywork and light clusters. You must source a rear light that matches your specific generation, so a 2018 car needs an X166 unit and a 2020 car needs an X167 unit. Confirm the generation with your breaker against your registration to be sure.

Trim level does not affect rear light fitment on the GLS — the light cluster itself is the same across AMG Line, AMG Line Premium, and AMG Line Premium Plus grades for a given generation. You may find cosmetic differences in the look or tint of the lens if sourcing from a higher-spec car, so check the appearance matches what you expect, but the mounting and electrical connection will be the same. Generation is the only fitment-critical factor here.

Yes, absolutely — NS and OS rear lights are handed and are not interchangeable with each other. When contacting a breaker, always specify whether you need the driver's side (OS, right-hand side) or passenger's side (NS, left-hand side) as well as your generation. Getting this wrong is one of the most common ordering mistakes on rear light purchases.

The GLS and GLE are distinct models with different body proportions — the GLS is a larger seven-seat SUV while the GLE is a five-seat model — and their rear light clusters are not the same. Whether any specific panel or cluster might cross over between same-platform variants is something you should confirm with the breaker against both registrations rather than assume. Do not rely on visual similarity alone when sourcing rear lighting.