most edge with a AUX buton or SAT can use this ipod interface i seen it show text on the radio display
http://www.oemautosound.com/pc-374-112-pie...-2005-2007.aspx
about the navigation sync
IT WILL better to install a aftermarquet radio from alpine,pioneer or kennwood they have ipod cables for the radio for under $50.00 they also have voice comand modules for under $100.00
and stering remote and a lot easy to install i am sure the factory unit will work but it will cost a lot more to piece it all together or find all the parts that you need
http://www.pioneerelectronics.com/pna/v3/p...3070352,00.html