Do you also have the Alpine KCA-420i unit and the cables? If so then you simply remove the CD changer, plug the Intravee-II unit into the connections that used to go to the CD changer and then plug the KCA-420i into the Intravee-II. The iPod connects to the KCA-420i

Also some good photos and instructions here - http://www.bimmernav.com/store/catal...-item-166.html

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