I have an iPhone and a bluetooth in my car that works perfect with making calls, but car isn't setup to transmit music, only calls, at least that's what they told me when I called Audi. Surprisingly Siri works through bluetooth, so is there a way to trick the car and phone to play music, maybe to make it think it's Siri. My phone is jailbroken, maybe there is an app ?
I tried the little trick where you play the music and then go into voicemail and select audio and your bluetooth, but I guess that doesn't work with the new iPhones. I don't have an AUX output and the music sounds like crap with the FM transmitter.

Any ideas would be greatly appreciated.