Audi q7 2007 2g mmi keeps rebooting

Force reboot . Press the setup button and the centre knob and the right top knob together ,as soon as you leave the 3 button in will reboot

Because the battery went flat. Most likely need a code from the dealership to make the radio work again.

Check for moisture intrusion , loose connections, corrosion.

Check to see if any right speaker wires are pinched which would cause a short circuit. Make sure no bare right speaker wires are touching the frame of the car.

I bet that rear screen washer lines are broken and fluid damaged electronic under trunk trim.

I have a brand new A6 and the MMI is not working. Keeps going on and off. After 4 trips to the dealer, Audi is still not owning up to the problem.

There where 3 language choices in the original MMI software. English, French and Spanish. I assume since you're getting German, the car is an EU A8, not North American. German was not in the North Amercan A8. Only the newer software from MY 07 up have no language choice on startup. It is set under car, setup menu. If you set the language and it defaults back to German, I would at least check with the dealership to see if there is an MMI update for your vehicle. If not, then the main head unit (07) may be faulty, since the settings are stored there.

I have a 2006 A8 and if you need help with the command say "help mmi" or when you are in one of the following modes: radio, CD, or Navigation. you can say "help ." This should provide you with all the commands the voice command can understand.

Sorry, not posible.