This post was very timely. My wife found a 1994 S320 with 117,000 miles on it for sale. It was owned by the owner of a quick lube operation. (At least we know the oil was changed on a regular basis). Looks good, except for some discoloration on the driver's seat and one of the back up guide antennas is broken. Wiring harnes recently changed and new head gasket kit installed along with new tires. everything else seems to check out. Thanks for all of the tips.

__________________
1983 300D Silver -mine- 185,000 w/ donor transmission
1983 300D Gray (Franklin) -parts car- 180,000- no transmission and no oil pan
1994 S320 Silver -wife's-135,000