German crooner Udo Jürgens once sang “Mit 66 Jahren da fängt das Leben an”, which translates to “Life starts at 66″. We think Heidi Hetzer would beg to differ. This lovely lady is not only a local Berliner hero but also quite the serious competitor when it comes to automotive racing and all this at the age of 75. She is now planning to follow in the tire tracks of Clärenore Stinnes, who was the first woman AND the first person to drive around the world…