Looking for some tune up parts for a 1983 500SL, but their is not a listing.
 

I own the above mentioned car, and I want to acquire some tune up parts. However, I'm not finding a listing for the 500 SL as it is a greymarket car. With this, is their a way to find part numbers that I need so I order the right plugs etc? Thanks for any information, Nick.

The MB EPC (not MAC compatible) is your friend.
http://epc.startekinfo.com/epc/welcome.jsp

Subscription is free. You can find the 500SL PNs and see what crosses with US models.

I have an owner's manual in .pdf format and have no recollection of where I got it. It says the spark plug is Bosch W7D, of which you will likely never find. I did come across a guy a while back who had 51 of them. He no longer has any, but I know who does. :) The manual also shows a Champion N9Y plug. I have no idea on the availability of those.

If you want a copy of the manual, shoot me an e-mail address and I will forward.

Don