WARNING: This page is about a different car, the 2008 BMW 760Li, 2007 BMW 760Li, 2006 BMW 760i, and 2006 BMW 760Li. However, it is still accessible from the selected car via links, so may be relevant.
Dimensions in mm
Fig 1: Front Exterior Body Gap Dimensions And Measurement Points (Front View)
Courtesy of BMW OF NORTH AMERICA, INC.
Fig 2: Rear Exterior Body Gap Dimensions And Measurement Points (Rear View)