Replacing the CD Changer completely and going the iPOd route is recommended. This will give you steering wheel control and text display on your NAV screen.
We are shipping kits next week that have High Definition Radio built in for even more features:
DICE High Definition Radio w/ iPod Integration
http://www.europeanautosource.com/pr...roducts_id=467
Depending on your version of DSP will determine if you need our DSP adapter or not.