WARNING: This page is about a different car, the 2012 Audi S5, 2011 Audi S5, 2010 Audi S5, 2009 Audi S5, and 2008 Audi S5. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Installed Position Of Rear Double Clamps
Courtesy of AUDI OF AMERICA, LLC
-- Install double clamps so that the bolt ends do not project over lower edge of double clamp.
Installed position: Threaded connections point forward.