You can confirm the tyre size on the tyre sidewall (for example, 265/40 R21), on the door jamb sticker, or in the owner’s manual. Using your registration in the search tool will usually bring up the correct options, but always double-check the size currently fitted.

MO or MO1 markings indicate a tyre approved to a Mercedes original equipment specification. They are often a good choice for maintaining factory ride and handling characteristics, but you can also buy non-marked tyres as long as the size, load index and speed rating meet the vehicle requirements.

It is best to fit the same brand and tread pattern across each axle, especially on a high-performance SUV. Mixing can affect grip balance, braking and stability, so replace tyres in pairs where possible and keep left and right tyres matched.

Not always. Some vehicles are supplied with run-flat tyres, while others use standard tyres with a mobility kit. If you switch type, consider ride comfort, puncture support and whether your vehicle has space for a spare, and keep to the correct specification for your wheels.

After selecting tyres, you choose a local fitting partner and book an appointment time. The tyres are delivered to the garage for your visit, and it helps to bring your locking wheel nut key if you have one and allow time for TPMS checks if your vehicle uses tyre pressure sensors.