Check Valve, Removing And Installing, Cylinder Bank 1 (Right): Notes
WARNING: This page is about a different car, the 2015 Audi A7 Quattro and 2014 Audi A7 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The removing and installing procedure for models without a connection for the coolant hose is described here.