I know your question was 2 year ago, but I was reading on one of the other posts that if you install even something fancier but aftermarket like an Android Deck, that you will only be able to play rear DVD audio through the headphones on the rear DVD entertainment system. There are two ways to remedy this. Either cut the harness from the rear DVD entertainment where it integrates in to the the radio harness and figure out which wires serve which function, or alternatively, get a 3.5mm bluetooth transmitter and pair it to your Android Deck, then plug that in to your rear DVD Entertainment system headphone jack.