Interesting X5 M Prototype Video (official)
This video is available through YouTube too but when I watched it, the quality wasn't too good and it loaded very slowly.
Here is a better quality version of the video, enjoy.
Caution: Driver (a BMW engineer) talks in German.
Location: Nordschleife
Verdict: impressive performance for a SUV.
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RC (Germany) - Rennteam Editor 997 Turbo, BMW X5 M (03/2010), BMW M3 Cab DKG, Mini Cooper S JCW