"In 1938, Mercedes-Benz began production of the largest, most luxurious limousine in the world. A machine of frightening power and sinister beauty, the Grosser 770K Model 150 Offener Tourenwagen was 20 feet long, seven feet wide, and tipped the scales at 5 tons. Its supercharged, 230-horsepower engine propelled the beast to speeds over 100 m.p.h. while its occupants reclined on glove-leather seats stuffed with goose down. Armor plated and equipped...