Its slowly coming back to me now. The TDC mark is confusing. I think I finally determined it by looking at the 1 I 0 2 I 0 3 I 0 on both sides of TDC, then finding the center between them. If my memeory is correct, TDC looked like this 0 I T (a T instead of a 0 on the right side of the hash mark)

J. M. van Swaay

(I'm getting a bit nervous here, keep my disclaimer in mind)

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1994 E320 Wagon, 230,000 miles
1995 E320 Sedan, 106,000 miles
1994 E500 Sedan, 79,000 miles