Mike,
You don't say, but I assume you have a 230SL. If so, your steel wheels should match your body color and your two piece hub cap centers should match your hard top.
It seems the 280SL with one piece hub caps are typically all one color with the body, hard top, and hub caps all matching (can't see the steel wheels with these hub caps).
Congratualtions on understanding your data card. Did you find anything else interesting? Do you have axle assembly numbers, steering assembly numbers, transmission number, etc.? I do on my card and they all match the components.
Do your stamped body panel numbers all match? (hood, soft top boot, hard top)
Thanks,
Rodd
Powell, Ohio, USA
1966 230SL, Euro, Auto, Leather, both tops
1994 E420