52 14 415 Replacing support for left or right front seat (normal/electric)
WARNING: This page is about a different car, the 2010 BMW 535xi, 2009 BMW 535xi, and 2008 BMW 535xi. However, it is still accessible from the selected car via links, so may be relevant.
The operation for removing the support with/without OC3 mat is described in:
Seat with air conditioning:
Remove A/C fan from support.
Installation:
Make sure fans have correct cable routing (1).