WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.
Pull trim threads (1) out of seat cover.
Installation:
Slide trim threads (1) into new seat cover. If necessary, cut mounting for trim threads.