WARNING: This page is about a different car, the 2015 Audi Q7, 2014 Audi Q7, and 2013 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.
-- Carefully remove the engine cover from the 4 bolts -arrow- one after the other. Do not remove the engine cover on one side or in a jerking manner.