Tyres.co.uk has options for 2019 CLA with 18-inch wheels, including the sizes 225/45 R18 for the Michelin Primacy 5 and Pirelli Cinturato P7. Be sure the tyre size, load index, speed rating and XL or run-flat variant match the specific registration when doing your purchase.
Check inside the fuel door for the tyre pressure placard. This gives the approval for the wheels and tyres for the Mercedes CLA and the pressure at which it is approved. Don't forget to check the tyre sidewall and registration since the specifications for different generations, wheel options, AMG, and 4MATIC versions are not the same in those areas.
Concerning the Mercedes CLA models, not all four tyres always need replacement. Mercedes requires the same brand tyres on all four wheels of the vehicle, with the same size on both axles. This also applies to 4MATIC versions. Tyres should be replaced in axle pairs, and the new pair should go on the rear axle.
