BMW X5 Extreme Sightseeing Tour: Episode 1.

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Munich - don't look down. With a little help from mountain bike professional Igor Obu, Klaus Deuser is ready to face his first challenge on the Extreme Sightseeing Tour: a mountain bike ride high above the roofs of Munich. And at 40 metres above the ground on a surface 75 centimetres wide, the last thing you want to do is look down.

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