I have a 2002 BMW E46 M3 Vert.
I was recommended to this post by my fellow BMW enthusiasts from m3forum.net.


This is my problem:

My Navi/Radio head unit stopped working. When I turn On the car, the “Warning” screen comes on and just stays there. I am not able to press the right knob (navigational button) to confirm, nor am I able to turn on the Radio by pressing the left knob. I am not able to flip open the face plate either.
I checked inside the trunk and there is power to both the Computer and CD Changer. I am able to eject the CD from Navi unit and also the CD changer. When I put the discs in, I can hear it cycling through.
I also tried the fuses, but it didn’t help. I pulled fuse # 7 & 41 out then put it back in but it didn’t help.

Update:
Yesterday i discontected my battery for 2 hours but it didnt help.

Any suggestions? Need HELP!!!!