My 2008 Audi a4 Quattro cab rear view mirror came off & dangled by the wires. It is the Automatic Anti-glare/Interior Mirror With Compass. The unit came off the windshield intact. Nothing was left on the windshield but the bead of gel-like glue. Stealership wants to replace windshield with mirror for over $600. Says the mirror/base is part of the windshield. Warned that mirror could not be glued back and be guaranteed to stay on. Has anyone successfully reattached their mirror? Thanks much!