2022 Mercedes-Benz C-Class tire sizes & fitment

How to choose tires for the 2022 Mercedes-Benz C-Class C300

The 2022 Mercedes-Benz C-Class C300 ships from the factory on 225/45R18 tires mounted on 18x7.5 wheels. 2 approved fitments are documented for this model year, allowing some flexibility between performance, comfort, and winter compounds.

Tire choice on the Mercedes-Benz C-Class comes down to three trade-offs that matter more than brand loyalty: load index (must equal or exceed the OEM number), speed rating (must match or exceed the placard), and UTQG treadwear (higher means longer life, lower usually means stickier rubber). Owners replacing factory tires with the same compound class, for example all-season for all-season, generally see no change in ride characteristics or fuel economy. Switching categories (performance summer to all-season touring, for example) is where the trade-offs show up at the contact patch.

Before purchasing, verify the tire size on the driver-door placard of your specific vehicle, since trim levels and option packages can shift the original fitment. The placard reading is the authoritative source.