Charmalu will have the definitive answer on this, but in the meantime here's my recollection:

There are four bolts the hold the whole seat to the floor pan. A fifth bolt holds part of the restraint system to the tranny tunnel.

I think that there are actually six bolts that secure the seat bottom to the tracks: 3 each side, with one at each end and one in the middle. You have to slide the tracks back and forth to line up with access holes. You'd have to have a pretty compelling reason to not take the seat out if you wanted to leave the tracks in place; you might be able to line things up with a mirror, and access the bolts with just the right extension, but it would be a nightmare.

Is your problem that one of the floor pan bolts is stripping out the Tinnerman nut that secures it to the tab that comes up from the pan?

Kurt

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- '79 240D - engine swap complete! Engine broken in! 28-31 mpg! Lovin' the ride!
- '86 190D (W201-126) - 2.5 NA engine, 5 speed, cloth interior, manual climate controls, 33-34 mpg (sold to forum member).