Help! (URGENT) Problem with volume

[Chip]

I have an 05' 4.4i X5. Today, when i started using the GPS (for directions to a restaurant), it showed the directions, but gave no volume. i went into settings, and increase the nav volume, but it still didn't work. Later, I tried to turn on the radio, it does not work either. When i press the knob in, the little orange light does not turn on. Furthermore, the GPS is a little buggy (for example, when you are in the direction mode (no map) and push in the right side knob for the menu, only the back button showed. After I restarted the car, the other options showed).

In short, my radio and nav volume doesnt work!

Thanks for the help!

Btw, if it helps I have the sport, navigation, rear climate package...

[ncx]

Have you checked the fuses for the radio module? Since you have a '05 this should be covered under warranty. Good luck.

[Chip]

thnx, i will check fuses