Follow these instructions and there's a wealth of info available.......

http://www.ronstultz.com/knowledge/Documents/BMW%20X5/BMW%20X5%20-%20Access%20the%20Hidden%20Onboard%20Computer%20(O BC)%20Functions.htm

You'll need to cut and paste it. I tried to link it but it wouldn't play the game.

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2005 3.0d E53
Sports Pack