WARNING: This page is about a different car, the 2003 BMW X5 and 2002 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
Lever out door switch center (1) in direction of arrow.
Disconnect associated plug connection(s) and remove door switch center (1).
Fig 1: Removing Rocker Switch For Front Side Window Operation (Door Switch Center)