hardwire parrot bluetooth into X5?

[Jelasky]

I purchased a 2003 X5 that came with a Parrot LS3200 bluetooth device installed. Whoever installed it didn't take the time to integrate it into the sound system. It has its own little speaker under the dash and when calls come in it doesn't mute the stereo or switch to the phone input. I do have the aux input installed which works great.

Is it possible to hardwire the Parrot into the head unit? I seem to recall the extra pins on the aux input cable being for the phone system but I can't find a wiring diagram for those pins. If the steering wheel controls aren't active that's ok, I just would like the audio to come through the main system and have the mute function active. Ideally this won't disturb the aux input I already have working.

Thanks!