bmw3

I need to know where i can hook up the orange and white wire on my harness in my 2000 323ci so that my navigation dims when i turn my lights on at night.

Everyone is talking about the new 80 gb's and the 160 gb's. I have the new itouch. It works fine with the music in my n4, but when i touch video on it, the n4 indicates that im pressing it, but absolutely nothing happens.

i just got my avic-n4 installed and i hooked up my cd-i200 today, the music works perfectly fine. but when you touch video, it shows that im pressing it but absolutely nothing happens. Is this because the n4 is not up to date with apples new ipods?? Also when its night time, my navigation doesnt dim, its still really white and bright. Is the orange and white wire have to be hooked up to a 12v or something? And last but not least my with my bluetooth, when i search for contacts, my n4 doesnt have all the contacts names saved on it.. I had uploaded all my contacts through blue tooth.