Second Hand Mercedes-Benz GLS Tyre

The GLS spans two distinct generations here: the first-generation GLS (X166, 2016–2019) and the second-generation GLS (X167, 2020 onwards), and these use different wheel and tyre specifications, so a tyre from the X166 will not simply carry across to the X167. Tyre fitment depends on the rim size and width fitted to your specific car, which can vary even within a generation depending on engine variant and optional wheel packages. Check the tyre placard on your driver's door jamb or the existing sidewall markings for your exact size, and confirm with the breaker that the tyre they have matches that specification precisely.

On the GLS, larger and higher-performance engine variants such as the GLS 63 AMG were frequently factory-fitted with larger diameter wheels and wider tyre profiles than the standard diesel or six-cylinder petrol models. This means a tyre pulled from a GLS 400 or GLS 350d may carry a different size to one from a GLS 63 AMG, so you cannot assume all GLS tyres are the same size. Always quote your full tyre size — width, profile, and rim diameter — to the breaker rather than relying on model name alone.

Trim level on the GLS — whether that is AMG Line, Grand Edition, or similar — does not fundamentally change the tyre fitment requirement, though AMG Line and sportier specifications were commonly paired with larger optional alloy wheels that take a different tyre size to the base wheels. What actually matters is the wheel rim diameter and width currently on your car, not the trim badge. Check the sidewall of your existing tyres for the exact size code and pass that to the breaker.

The X166 GLS received a facelift during its production run but remained on the same platform and carried broadly similar wheel specifications throughout, so tyre sizes were not fundamentally changed at the facelift. However, if the facelift model was ordered with different optional wheel packages, the rim size — and therefore the tyre size — could differ. Confirm the exact tyre size code from your door placard or existing sidewall with the breaker before buying, as tyre size must match precisely for safe use.

In the UK, used tyres are legal to sell and fit provided they have adequate tread depth — the legal minimum is 1.6mm across the central three-quarters of the tread — and show no structural damage, cracking, or bulging. Many breakers supply part-worn tyres that meet these requirements, but you should inspect the tyre or ask the breaker to confirm the tread depth and condition before purchase. For a heavier vehicle like the GLS, ensuring the load index and speed rating on the sidewall also match your existing specification is equally important.

Find the size code on the sidewall of one of your current tyres — it will read something like 315/40 R21 — and also note the load index and speed rating that follow it, as these must match your vehicle's requirements. Pass your full registration number alongside that size code to the breaker so they can cross-reference it against the car the tyre came from. Never guarantee fitment purely by model name, as wheel sizes across GLS variants and option packs varied considerably.