[rexel77]

I have a 07 335 with nav. Once in a while after starting my car, I don't get any audio from my speakers. This includes radio, iPod, Bluetooth, or backup sensor warning. No audio period. Once this happens, the sound will remain off until the next morning. I was told by my dealer that the car does a reset after 4 hours or so which is why it works the next day. Is there a way I can force it to reset sooner?