There are a few post confirming that the iPhone 5 works. It works on my car. I have tested iPhone 3, 3S, 4, 4S and 5 on mine. All works well, no issues whatsoever.
What I do is I connect the car and phone via BT through the phone function of the car
And then turn on streaming through the music settings where you adjust bass, treble, increase volume while driving, etc...theres a menu for bluetooth streaming music in that
Check the translation pdf file pinned on the main V forum page. PM me if you need more details. I cant remember exactly now that I'm at work but can go thru with you later when I get in my car or at home.