52 13 420 Replacing Padding For Left Or Right Front Seat Backrest (Normal/Semi-Electric)
WARNING: This page is about a different car, the 2010 BMW X5, 2009 BMW X5, 2008 BMW X5, and 2007 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
Operation is described in:
Remove backrest cover for front seat. See 52 13 405 Replacing Backrest Cover For Left Or Right Front Seat (Normal/Semi-Electric) .