If I remember correctly, the FSM describes a measurement that can be made to insure the TC is fully seated. I'll see if I can find the reference. I seem to remember it involved laying a straightedge across the bellhousing and measuing the distance to the TC mounting lugs......

J. M. van Swaay

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