67 31 702 Removing And Installing/Replacing Drive For Head Restraint Height Adjustment (Comfort Seats In Rear Compartment)
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.
Necessary preliminary tasks:
Remove rear head restraint mounting . See 52 24 380 REMOVING AND INSTALLING/REPLACING REAR LEFT OR RIGHT HEAD RESTRAINT MOUNT (NORMAL) .
Replacement:
Initialize drive unit for head restraint height adjustment. See 67 31 ... NOTES ON INITIALIZING ELECTRIC SEAT SERVODRIVES .