the path is easy, since the CPU as a docking slot, which you can put your iPhone will be, you can control all the music, the sound directly from the iPhone.
Devium Dash connect personally iPhone to speakers for sound. your headunit 2-DIN from that does not exist any use interface, the iPhone screen itself, that the interfaces.
Once installed on your dashboard Devium iPhone, you have full control over your iPhone as iTunes, streaming media and others. It was also responsible for Pandora and Netflix use Bluetooth hand-free, turn-by-turn navigation applications, and certainly Siri.