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Concept Car of the Week: Mercedes T80 (1939)

In the decade before World War II, no other carmaker even came close to matching the combined dominance of Mercedes-Benz and recently founded Auto Union. Supported by Adolf Hitler's Nazi government, the two brands had grander plans to demonstrate Germany's technological supremacy. In August 1936, Auto Union engineer Ferdinand Porsche and race car driver Hans Stuck approached Wilhelm Kissel, chairman of Daimler-Benz, and presented a plan to build a car that would set a new land speed world record.

E85 makes inroads on cost and availability

Three years ago, we embarked on a Midwest road trip in search of what was then the Holy Grail of fuel: E85. Our findings weren't too positive--there were far more E85-compatible vehicles on the road in 2006 (5 million) than there were E85 pumps to fuel them (about 700 out of some 200,000 fuel stations nationwide). In addition, those burning the mix of 15 percent gasoline and 85 percent ethanol were paying a pretty penny for their earth-friendly ways, losing about 15 percent in fuel economy while often paying the same price as regular unleaded.

Contest: Mazda Design Challenge

The 'Mazda Design Challenge', launched September 27 exclusively through the social networking website Facebook, is enlisting help from Facebook users in the United States to compete to design a future Mazda 3. The winner of the contest will work with Franz von Holzhausen, director of Mazda Design in North America, and his team, to bring the concept to life, live on stage at the 2007 Los Angeles International Auto Show in November. Contestants submitted a 150-word description of their vision of the 2018 Mazda 3 including an optional sketch.