51 46 004 Replacing trim for oddments tray (back shelf with rear window roller blind and through-loading system)
WARNING: This page is about a different car, the 2010 BMW M3, 2009 BMW M3, and 2008 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.
Operation is described in:
Removing and installing/replacing trim for oddments tray (back shelf) .