well there is an optional ipod interface, but I don't believe it's compatible w/o deleting the CD changer, however the Intravee/Dice is a good option. I have an aux-in in the glove box, which was an option, and it works very well and has 6 different levels of amplifications + the normal volume control and it's more compatible (can use other things that the iPod)

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2006 BMW X5 4.8is Lemans Blue/Beige/Dark Maple
-Nav, Comfort Seats, Heated Steering Wheel,
Rear Airbags, AUX Input
2009 BMW M3 Space Grey/Black/Carbon
-all options