51 47 154 Removing and installing side finisher in luggage compartment at front left or right (Z3 coupe, M coupe): Installation:
WARNING: This page is about a different car, the 2002 BMW M Roadster, 2002 BMW M Coupe, 2001 BMW M Roadster, and 2001 BMW M Coupe. However, it is still accessible from the selected car via links, so may be relevant.
Guide seatbelt strap (3) correctly into side finisher (2).