Date registered: Oct 2007
Vehicle: '71 250C, '99 SL500
Location: North Las Vegas, NV
Mentioned: 0 Post(s)
Quoted: 6 Post(s)
It is a 380 mm or 15" wheel. The only numbers on the wheel is CD 32. You will also need an adapter. I found the wheel and adapter seperately on E-bay a few years ago.
Found this on Amazon. Should be a good part number to help with your search
Nardi-Personal Steering Wheel Hub Adapter (Boss) Kit - Mercedes 280 C W 114 68-76 - Part # 4370.94.2802-12. I have attached a photo as well. Sorry I don't have a left handed tape measure!! ha Good luck on your search.