Hi I have just bought a 1998 w140 coupe CL 420.....I am just wondering about wheel size. The car came with 18 inch alloys, though I don't think they are period original. I think they may be a more modern mercedes design. My big question is what size wheels should be on the car. Was the cardesigned by merecedes to take 18 inch alloys. Were 18inch alloys a option for them in 1998 or has someone over sized the wheels should there be 17inch or 16inch on the car