This is for a friend.
He has the following for sale that have the ability to work with full control from your OEM radio with CD changer control
Alpine CHM-S630 - 6 disc CD/CD-R changer
Blitzsafe ALP/DMXV.3a - Adapts Alpine Changer to OEM cable in trunk
Compatable with:
1998-2001 Cabrio
2002-2004 Eurovan
1999-2005 Golf
1999-2005 GTI
1998-2005 Jetta
1998-2002 Passat
$100 obo
Pics for reference:
