i have a bmw 328i coupe, and wen i tried to plug my ipod (30gig classic) into the car, it said don't unplug and so i assumed it was workin...but afte like 5 hours it still didn't work so i unplugged it...i mean i have like 2000 songs..but not workng after 5 hours is just outrageous..is something wrong? anyone have a good guess?