Halsey Import Parts is the hookup if you live in Portland and need parts for your MB, VW, Audi, almost anything.
Pretty basic website but pretty competitive pricing and the people there really know their stuff. Willy is da' bomb.
http://www.halseyimportparts.com/
If you call during busy hours, expect to be put on hold for a bit. They are very busy. Also they can have almost any special part in a few hours after you order it...3-4 deliveries a day to the place there of special stuff.
I've never had to wait for a part I needed more than a day...the usual case is call in the morning and its there by 10am or 12pm.
Good people.