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No two side skirts are quite the same across different vehicles, so getting the specifics right matters when you buy used, second hand or a replacement. Answer a few quick questions below and breakers will only quote if they have the exact matching part in stock:
The GLS exists in two generations: the first-generation X166, produced from 2016 to 2019, and the second-generation X167, which launched in 2020 and received a facelift in 2023. Generation is the single most important factor for side skirt fitment, as the body panels are entirely different between the X166 and X167. Always confirm your generation with your registration plate when contacting a breaker.
The 2023 model year marks the facelift of the second-generation X167 GLS, and while the underlying platform is shared, exterior panels including side skirts may differ across that facelift boundary. You should confirm directly with the breaker whether the pre-facelift X167 side skirt interchanges with the post-2023 facelift version against your specific registration. Do not assume the parts are identical without that check.
Trim level does not determine the underlying fitment in terms of mounting and body structure, but it does affect appearance — AMG Line and AMG variants carry a more aggressive side skirt design compared to the standard trim. A side skirt from an AMG Line GLS will physically differ in style from a base-trim skirt of the same generation, so make sure the breaker confirms both the generation and the trim specification of the donor vehicle if appearance matching matters to you. Structurally, the generation and facelift period remain the key fitment factors.
No — the X166 and X167 are entirely different platform generations with different body structures, so their side skirts are not interchangeable. Always source a side skirt that matches your specific generation, and confirm this with the breaker using your vehicle's registration. Mixing parts across generations is not a viable option for this component.
No — engine choice, whether diesel or petrol, and drivetrain layout do not affect side skirt fitment on the GLS. The key variables are generation (X166 or X167) and whether your vehicle is a pre- or post-facelift model. Confirm those two details with the breaker and engine type can be disregarded for this part.
When contacting a breaker, give them your registration, confirm your generation (X166 for 2016–2019, or X167 for 2020 onwards), specify whether you have the standard or AMG Line trim, and clarify if your X167 is a pre- or post-2023 facelift vehicle. Also confirm the colour or whether you need a painted or unprimed part, as side skirts often need colour-matching. Providing these details upfront will help the breaker find the closest match from their stock.