Operation is described in:
WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2006 BMW 330Ci, 2005 BMW 330xi, 2005 BMW 330i, 2005 BMW 330Ci, and 2004 BMW 330xi. However, it is still accessible from the selected car via links, so may be relevant.
Remove and install rear window, refer to REMOVING AND INSTALLING REAR WINDOW (TOURING) .
Remove all glass splinters, also from underneath seats.
Check seat belts:
- condition of seatbelt strap,
- function of retractor mechanism,
- locking reel and
- seatbelt buckle.