i was helping my friend install one of those alpine ipod+usb head units tonite, and came across something strange. He has a VW jetta, 2005, i think, and the harness he bought didn't have any sort of colors for the illumination, and the ignition. we double checked with the local shops and the piece he picked up is in fact the correct model of harness for his ride (so they say)i ended up getting it to work through trial and error, but the thing is, the head unit will turn on when the ignition isn't engaged, thus draining the battery. you have to manually turn it on and off. kind of a bummer. i'm wondering if it's continually draining the battery, even when "turned off". anyone have experience with VW's?