I want to connect my archos av 420 to the rear panel of my x5 (where there are two AV jacks "in" and "out" but when I do it nothing happens...sometimes I hear a the sound but only for a few seconds and then the word "mute" appears on the display.
Is there a special cable for the rear av jack of the car?
The same thing happens if I try to listen to the music from my ipod.

Please help me

Thanks to all