I've got a 2001 C320 sport. On Tire Rack it looks like the only size SSR GT3 that will fit on my car is 19". Why won't the 18" wheels fit? I saw a post in the AMG forum where somebody had 18" SSR GT3's on an 02 C32 AMG. I really love these wheels but I don't want to put 19's on my car.