1995 A6, 2.9L. I'm looking for the wiring diagram for connections on the GAMMA radio I have. I have to turn it on and off with the radio's on/off switch. Turning the ignition off does not turn off this radio. On/Off switch fails from too many cycles. I'd like to wire it so it will go off with the ignition, yet hold memory & not go into SAFE mode. This would avoid wear on the actual radio on/off switch.

I would think there are two +12Volt leads for this radio. One continuous +12V to hold the memory and prevent it from going into SAFE mode and the other a switched +12V from the ignition switch.

Anyone have info on this please?