What is the difference? I bought this used and it did not have one. I also do not know what type of Navigation System I have. It says Bose H2 on the screen when I start the truck. It also has a back up camera hooked to it when I put it in reverse from the Hitch. So what do the newer disks have that hte older ones dont? Newer maps? More features? I am not paying $200 for a DVD.
