Use the registration search for the most accurate match, or check the tyre sidewall for a size like 225/45 R17. You can also confirm sizes on the driver door placard or in the owner’s manual, as they vary by trim and wheel option.
In the UK it’s best practice to fit matching tyres (same size, type and ideally the same model) across each axle to maintain predictable grip and braking. Mixed brands can be used if the specification matches, but handling may be less consistent.
The UK legal minimum is 1.6mm across the central three-quarters of the tyre, around the whole circumference. Many drivers replace at around 3mm for stronger wet grip and shorter stopping distances, especially for a rear-wheel-drive setup.
Only choose runflat tyres if your CLC-Class is set up for them (often with a tyre pressure monitoring system and no spare). Switching from runflat to standard tyres can change ride and handling, so check the handbook and consider fitting in matched sets.
No. After choosing your tyres, you can select a nearby fitting garage, pick an appointment time and have the tyres delivered to the fitter. The garage fits them on the day, typically including balancing and disposal of your old tyres.