61 31 245 Removing and installing / replacing rear window button
WARNING: This page is about a different car, the 2003 BMW 525i, 2002 BMW 525i, and 2001 BMW 525i. However, it is still accessible from the selected car via links, so may be relevant.
Remove shaft bearing for rear wiper. See Fig 1.
Disconnect connector (1) and remove rear window button (2).