A bit more digging finds the car was loaned for testing/review by BMW HQ to a Pistonheads user called Kanaga, see his post at the bottom of this page, along with pics of your car...
http://www.pistonheads.com/gassing/t...+spotted&mid=0
As Upturn666 says, in your case I don't think it's not anything to worry about (if it were GOX it would be a different matter!), but if it were me I'd certainly want that written reassurance from the dealer, because press cars are generally treated harder.
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May '11 - Nov '11 - 1M Coupe. Gone but not forgotten.
Alpine White, Black Boston leather with Kyalami Orange stitching, Bluetooth, BMWP Kidney Grilles, BMWP Racing pedals