depends on which kind of auto changer you have, if you have the in dash one (above head unit) its un likely youll be able to get it to run on a sony head unit with out and adaptor of some sort, if you have a sony boot changer (i have one in my mk4 which i put in and connected upto the standard 'gamma' head unit, this needed an interface unit to do so) it will run on a compatible sony head unit, but you have to remove the interface unit. Ive just fitted an mp3 sony head unit to my mk4 golf, i removed the interface and the standard rca/bus cables fitted straight into the sony head unit.
hope this helps???
