ipod nano
 

You should probably post this in the E53 forum.
http://www.xoutpost.com/x5-e53-forum/

2nd suggestion Check this information out under the heading Stereo

http://www.xoutpost.com/

You can integrate your nano with the DICE iPod integration kit. This is the kit you need:

DICE iPod Integration Kit for BMW
http://www.europeanautosource.com/pr...roducts_id=268

The DICE iPod Kit will integrate perfectly with your X5 and offer steering wheel control as well as ID3 text and charging of your iPod. Full CD Quality can be expected after installation. There's even an integrated AUX port for other devices.

The kit will come with everything needed w/ the docking cable. The iPod can be safely stored away in the glove compartment for 100% stealth installation and accessed completely from the steering wheel controls. The DICE comes with a 15-foot cable length to reach anywhere in the vehicle you like.

Let me know if you have any further questions.