If you look behind your seat on the lower right hand corner you will find a Silver unit with 4 screws. Inside is the seat adjustment mechanism that is driven by a worm gear. This worm gear is driven by the electric motor on the left side of the seat. The problem is that the cable that is used to drive the worm gear needs to be longer. I will ocassionally remove the 4 screws on the gear unit and move the drive cable so that it will adjust the seat temporarily. It will help if the seat is way out of whack. You can probably get a replacement cable from MB but I would imagine that it is overly expensive.