The streamlined sedan is about the same size and weight of a Mercedes-Benz C-Class and has a drag coefficient of just .17, which is lower than any car on sale today including the leading Mercedes-Benz ...

Daimler-Chrysler executives unveiled a four-passenger, diesel-powered concept car last week that they say would earn a fuel economy rating of 70 miles per gallon (4.3 litres per 100km) and would meet ...