In fact what we need is a video output on the phone (some phones have an hdmi output), and a video input on the car
With the Pro satnav + the DVD-changer, it may be possible. With just the Business screen... I'm pretty sure it is still possible... but more difficult !
An example:
http://www.e90post.com/forums/showthread.php?t=384459 but I didn't understand which functions he obtained with this.