Check the tyre size on the sidewall (for example 245/40 R19), the driver door placard, or the owner’s handbook. Many CLS-Class models use different front and rear sizes, so confirm both axles before ordering.
Yes, entering your UK registration can show factory-matched tyre sizes and ratings. If your wheels or suspension have been modified, verify the size and load rating on the tyre sidewall to ensure you order the correct specification.
MO marking indicates a Mercedes-approved tyre specification. It is often recommended for maintaining the intended ride and handling, but the key legal and safety requirements are correct size, load index and speed rating, and suitable construction (for example, do not swap from run-flat to non run-flat unless your car setup allows it).
It is best practice to fit matching tyres across the same axle to keep handling predictable, especially on a rear-wheel drive or 4MATIC CLS-Class. UK law requires at least 1.6mm tread across the central three-quarters of the tyre, so replace tyres in pairs on an axle when wear is uneven or close to the limit.
After choosing tyres, you select a nearby fitting garage and an available appointment time. The tyres are delivered to the garage for your booking, where they are fitted and balanced; any extras like new valves, TPMS service kits or old tyre disposal depend on what is included in the fitting package shown at checkout.
