Just came across this site when I was looking for some old benz parts.
apparently this guy is parting out a bunch of older mercedes and a lot of the stuff I've seen people ask for, this guy has.
http://www.msdra.com/mercedesparts.htm
this one caught my attention:
'81 300D Euro-spec sedan, green, palomino cloth, REALLY good-running approx 150K (non-turbo) OM617 & 4 speed manual. Oddball car, has ABS, small Euro bumpers, crank windows, self-leveling rear suspension w/pump on engine like a 300TD. Incomplete, but runs/drives.