I just found a unit from a 2009 Explorer. They said it will work with my setup even though I only have a 2007. It doesn't use a DVD for nav I don't think. I'm assuming this is the kind of programming I'll have to find someone to do to make it work with my Expedition's options. Just nervous about pulling the trigger and getting something that won't work, and I HATE dealers - they ALWAYS have ulterior motives in my experience. I don't trust a word they say.