A:AnswerYou should go in store and talk to a representative. You may need more than just the head unit. Your dash may need to be modified to fit the new unit.
If you have navigation on your phone, you may want to consider a unit that mirrors directly from your phone for less. Units with GPS built-in require updates. Your phone doesn't.
A:AnswerI have the basic in-dash stereo. They tell me its touch screen which i do not use. It is my understanding that it is not compatible with with back up features in its current state. I could imagine you could install a separate screen system and integrate it with the unit. But, i do not know that for a fact.