Thanks Gary. I have seen in some places that you can install a tailgate handle camera but need the dealer to activate it or you need to buy an expensive ABD2 unit. I just don't know because there is so little info out there about all of these new units ram uses. Most of it is from very smart guys who fiddle around and figure things out.
I can't even find out if the audio quality is better in the 8.4 units or are the electronics the same. I would upgrade for better sound and add an amp and speakers to boot.