Ground bolt to strut tower - tightening specification
WARNING: This page is about a different car, the 2010 Audi A5, 2009 Audi A5, and 2008 Audi A5. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Disengaging Catches -Arrows A- And Remove Upper Part Of Line Pass-Through -2- Upward -Arrow B-