52 17 010 Removing And Installing/Replacing Both Seat Rails On Left Or Right Front Seat (Comfort)
WARNING: This page is about a different car, the 2008 BMW Alpina and 2007 BMW Alpina. However, it is still accessible from the selected car via links, so may be relevant.
This operation is identical to:
Replacing both seat rails on front seat (normal/electric). See 52 14 010 REMOVING AND INSTALLING/REPLACING BOTH SEAT RAILS ON LEFT OR RIGHT FRONT SEAT (NORMAL/ELECTRIC) .