Hello, I bought summer rims (see appendix) afterwards for my R 500 and currently drive 275/40/20 tyres on it. However, as they are worn out soon and I do not want to mount the tyres specified by Mercedes (265/45 20), I would be interested to know which tyre size you ride on your 20-inch tyres? I don’t care about the type of tyre, this is a matter of faith, only the size interests me. I already have the same rims with the tyre size 275/50 20 ge see!…therefore my question. according to tire calculator should not work but 275/50 20, since these 5% would not show enough (compared to 265/45/20) on the speedometer and that would not be allowed!? Thank you very much Martin P.S.: I know that only two screws are mounted in the rim…this was only a test and now all screws are available! 😉