52 24 005 Removing and installing or replacing rear seat
WARNING: This page is about a different car, the 2011 BMW M3, 2010 BMW M3, and 2009 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.
Unclip rear seat on left and right towards top.
Installation:
Feed seat belt buckles (1) into openings in rear seat.
Lift out rear seat.
Fig 1: Feeding Seat Belt Buckles Into Recesses In Rear Seat