[Jeef Beef]

Okay, I managed to get the damn thing working today. With nothing better to do, I inserted my USB stick and nothing happened.

Took out the car key, reinserted it with the USB STILL IN THE PLUG and it started working fine. Music was playing off it with no problems. Don't know if I'll have to do this everytime, but I'm gonna take it to the dealers to get it checked out.

I'll let you know what the verdict is. Sounds like your dealer is making excuses, that's like saying attaching new speakers to your computer will cause the USB ports to fail.