Mercedes: Reassembling the seat track slides, mercedes club, 560sl

Question
I pulled my seats from my 88 560sl in order to clean the tracks and re-lube them.  The seat frame that rides inside of the tracks have 4 nylon pads that run on the top & bottom of this C-shaped channel that is the track.

When I disassembled these I did not pay attention to the fact that one of the 3 pads is different, with the contact surface offset by about 1/4" from the center line.  It is also black.

My question is which of the 4 positions do I put this black one on?

Answer
Bill B,
I have no knowledge of the track layout. I suggest that you google Mercedes club in your area. Give a call to one of the members and ask them to take a look for comparison.
Of find a use car dealer with your model vehicle to take a look.
Sorry I can be of no more help than this.
Let us know what you find out.
Rob.