radio is stuck on

[navin in KC]

I have a 2004 X5 4.4 and it has the stereo / nav unit that has a cassette player (like I ever used it). Today, I noticed that the buttons on the left side of the nav screen would not work and when I turned the key off to get out of the car, the stereo stayed on.

I was thinking that there might be a way to "reset" the radio / nav unit or maybe I could just disconnect the battery and then reconnect and affect a restart.

Any ideas?

If I do go for the battery idea, where is the battery? Will I need a restart code to get the stereo started again?

thanks,

navin