WARNING: This page is about a different car, the 2012 BMW 328i, 2011 BMW 328i, 2010 BMW 328i, and 2009 BMW 328i. However, it is still accessible from the selected car via links, so may be relevant.
Pull out rubber mount with special tools 33 4 351, 33 4 281, 33 4 466 and 33 4 465.
Fig 1: Removing Rubber Mount Using Special Tools 33 4 351, 33 4 281, 33 4 466 And 33 4 465