WARNING: This page is about a different car, the 2010 BMW M5, 2009 BMW M5, 2008 BMW M5, 2007 BMW M5, and 2006 BMW M5. However, it is still accessible from the selected car via links, so may be relevant.
Dimensions in mm
Fig 1: Front View Exterior Body Gap Dimensions And Measurement Points
Courtesy of BMW OF NORTH AMERICA, INC.
Fig 2: Rear View Exterior Body Gap Dimensions And Measurement Points