Does anyone know what the hidden codes are in the Concert/Bose system? I was wondering if there is a way to have the radio stay on when you shut-off the ignition - until you pull-out the key. This is the way it works in my A4s' (96 & 97) Delta/Bose Radios. The A8s Concert radio (maybe this is how the Concert works) shuts-off the radio until you either restart the radio or you start the ignition.