67 31 560 Removing and installing/replacing drive unit for thigh support

This operation is described in: 

"Removing the drive unit for thigh support.  See 52 16 022 REMOVING AND INSTALLING/REPLACING ADJUSTING UNIT FOR THIGH SUPPORT ON FRONT PASSENGER SEAT or 52 17 022 REMOVING AND INSTALLING/REPLACING ADJUSTING UNIT FOR THIGH SUPPORT ON FRONT PASSENGER SEAT .