A:AnswerYes it will connect to your existing DVD player and back up camera if you have one. It has the audio input and outputs on the back of the stereo
A:Answeryou will have to see if they have the face plate that matches your vehicle. I ordered mine from Idata Link Maestro, it also came with wiring harness
A:AnswerNo to the dealer and if it's hooked up to your reverse back up light or to ground on your shifter the camera will come on. I hooked it up to. A switch instead. You can also connect a second camera through the av port.