Hi: I purchased a 1972 350sl, it came with 15x6.5 Bundt wheels. I would like to reuse the tires (they are new) but want to go to a wheel and hub cap setup, can I do this? I have seen 15" Mercedes hub caps, but so far no steel rims, I think the original wheels were 14" steel? Can I get a 15" steel wheel to use? if so, off what year and model Mercedes?