52 26 005 Removing and installing/replacing rear seat (through-loading)
WARNING: This page is about a different car, the 2008 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.
Release belt lock (1).
Feed middle rear lower belt fitting with belt lock out of rear seat.
Lift out rear seat.