Before resorting to eBay, check out some of the parts houses that I've listed before (do a search on my name for the prior post). For example, I found the door electrical switch you need (round, 2-pole) at IPS in Boise for about $15.00. Go to their web site
www.ips-parts.com, put in your year, make and model, and check out the huge range of parts that are STILL available brand-new and at not unreasonable prices (half of what a dealer would charge, and as low or lower than what you can usually find on eBay. Either do a search on "door" or "switch" in the IPS catalog for this example (for some reason I couldn't find the switch by browsing the likely categories). One great thing you'll discover about old Benzes is that because MB tended to re-use the very same part for 30 years, replacement parts are both cheaper than you'd expect and also much more available.
The catalog system belongs to "World Pac" which I guess is the major wholesale supply house that most of the web import parts stores use, but the prices vary widely so check out a few of them. Also note that some of them have free shipping for orders over $50.00 so it's worthwhile to aggregate your small orders. I like IPS because they ship real fast, but you might have some luck with other suppliers as well.
If you can't find my earlier posts (I gave the addresses of about 5 suppply houses and a comparison of their prices for a small sample of common parts) let me know and I will e mail them to you (e mail me at
catrinus1@netscape.net or you can send me a private e mail through this forum).
Above all, do a search on this forum whenever you have a specific question. It is unbelievable how knowlegeable people on this forum are and how good the advice is, but you'll find that they've answered most of your questions in the past. The search is how you find out what has been said about your topic before.
Catrinus
73 280C
P.S. if you send me a picture or a good description of the door switch, I think I might have a spare of what you need -- I ordered the wrong part once and it was so cheap I just kept it. In my case, I have a coupe and didn't realize my door switch has a vacuum connection for the seat back lock as well as the simple electrical switch for the light. So I might have what you need and can send it for postage.