figured it out!
ok people after alot of head banging and looking at circuit diagrams i figured out how to get the phone audio through the stereo.
You need to connect the mute cable to both the head unit and the nav unit in the boot. on the stereo it goes into pin 1 on the vertical connector and on the nav unit it is labled which pin to use.
You then need to run the audio + and - back to the Nav unit in the boot and connect to the 2 pins show on the diagram ontop of the nav unit (i can't remember the pin numbers). I have now sucsessfuly connected my parrot 3200 LS to my bose symphony headunit and works great at higher speeds the audio level can be a little be quiet but apart from that it works great.
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