I changed the battery on a 2012 A4 2.0T and must have shorted a module or sensor cause my dash lit up like a Christmas Tree and my radio stopped working, every sensor warning is on and indicating failure but the car runs and drives , scanned and had them all cleared and they light back up, please if anyone can advise me which module or sensor I blew before I waste $ having all my sensors and modules replaced

 

From what I know this is normal - happens any time you change the battery. Its Audi's way of making you go to the dealer to pay $300 for a new battery.