52 25 ... Removing And Installing/Replacing Rear Panel On Rear Seat Backrest
WARNING: This page is about a different car, the 2008 BMW Alpina and 2007 BMW Alpina. However, it is still accessible from the selected car via links, so may be relevant.
Release retainers (1) on left and right.
Detach rear panel (3) towards bottom from guide (2) and remove.