[s-cars] New Stereo + factory CD Changer

[JR]

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I have an S4 in which the guy I bought it from replaced the stereo head uni=
t with a brand new factory radio (same as the old one only new).  For some =
reason it doesn't seem to operate my existing factory 10 disc CD changer.  =
I talked to a VW friend and he said that something had to be done to the st=
ereo.  That it may have to be programmed to work with the 10 disc by the fa=
ctory.  Is this true?  Is there anything that would need to be done to make=
 this replacement stereo control the CD changer?

Thanks,

JR
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