Its "nose" is a 2-inch-long glass cylinder coated on the inside with a concoction of glowing chemicals like those found in the belly of a lightning bug.

FORBES: A Nose For Bombs

Still, total fuel costs for driving a diesel Passat on a long highway trip are about 20% less than driving a four-cylinder gasoline Passat, rated at 31 mpg highway.

WSJ: Are Diesels Poised for a Comeback?

The long, low slung Sixteen, made entirely of aluminum, was named for the car's powerful 16-cylinder, 1, 000-horsepower engine.

FORBES: 2010 Detroit Auto Show