Registration search is usually best because it pulls up fitments linked to your vehicle details, including cases where front and rear sizes differ; use tyre size search if you have non-standard wheels or want to double-check what is currently fitted.
Check the tyre sidewall (for example, 235/40 R19), the driver door jamb sticker, or the owner’s handbook, then match the size along with load index and speed rating when searching.
Yes, some wheel setups are staggered, meaning the rear tyres are wider than the front. When buying, select tyres in the correct size for each axle and avoid swapping sizes between front and rear.
All-season tyres can work well for typical UK conditions if you want one set year-round; look for strong wet-grip ratings and the 3PMSF symbol if you expect winter trips where temperatures drop and traction matters.
The garage removes the old tyres, fits and balances the new ones, and usually disposes of the old casings (sometimes as a separate line item). Take your locking wheel nut key if your CLA35 AMG has one, and ask the fitter to check pressures and TPMS operation after installation.
