Tire & rim Setup
Also, you might get more replies in the x253 forum.
https://mbworld.org/forums/glc-class-x253-203/
https://mbworld.org/forums/glc63s-gl...x253-c253-217/
To answer your question, going down a size or two and getting rid of run-flats will help with ride quality. The facelift (2020 and +) has a much softer suspension. If the car you bought doesn't have stock tires, it will help if you tell us if you have run-flats on it? Make sure the tire pressure is also correct, since you don't have stock tires, you might not be able to use the gas fuel door values but try them as well if the tire specs are not too different from stock. Make sure you check the tire pressures and inflate when they are cold.


