There's one for sale on Ebay. According to the auction it's Mercedes Benz part No: 126.680.75.75.
http://cgi.ebay.com/ebaymotors/aw-cgi/ebayISAPI.dll?ViewItem&item=404674675&r=0&t=0

It's at $49.50 with over 8 days left, and it includes the following switches: 000.820.61.10 Defroster switch,000.820.90.10 Hazard switch, 002.820.99.10 Antena switch 000.820.59.10 Rear dome switch and 126.820.50.10 Sunroof switch...

[This message has been edited by Robert W. Roe (edited 08-10-2000).]