I recently picked up a 2008 LTD AWD with Nav, I didn't learn till after I brought it home that it was a 2009 version nav. Originally this vehicle came from the factory with the 6 dis CD changer. Unfortunatley there are some issues with this setup. No Sync access, no USB, no bluetooth. The travel link, gps nav, steering wheel controls and siruis work well. Through some digging I found out that a aftermarket audio company in Denver( Cartoys) installed this unit. I willbe incontact with them to see if they have any insight on getting some of the other features to operate.