German E-Bay W124 Search in Automobile
Translation services for either the description or the entire page through babblefish.com, altavista.com, google.com, etc.
Pay via wire transfers via C2it, from Citibank. Flat $10 charge for wire transfer, compared to $20-30 charged by US banks/ savings & loans.
Although seller may state that they only ship within Germany or Europe, if you e-mail them and ask, more times than not you will get a positive response.
Shipping can be prohibitive. FedEX and UPS can cost over $130 for a 7 kilo box. Usually on reasonably sized items, the seller can ship it via German Luftpost.