Thanks alot Jim H, cscmc1, braverichard, and wodnek for the quick helpful responses and tips!
I'll do a surprise visit and start the 300td in the cold. Hopefully it has good compression and would start. I really want to buy this car.
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1984 190D 160,000 miles -sold

1992 190E 124,000 manual 2.3 -sold


2000 c230K 84,000

1995 e300 134k