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.
NOTE:
for gantry crane
SI number: 6 04 03 (046)
Order number: 510 105
Side window locating fixture
Fig 1: Identifying Side Window Locating Fixture (51 0 105)