Volvo V90 wheel/tire combination

Moin, I bought a V90 D4 AWD from 2017 and would like to strap on it for the summer 20 inches. Does a 9×20 ET40 rim fit with 255/35 r20 without any problems or do I have to work on something? Can you also pull 245/35 on it? The report says that you have to do something with 255 on the fender and 245/35 is not allowed to process.