Sixt came to the U.S. in 2011, and it's already the nation's fourth-largest car rental company

Sixt Rent-a-car is the second-biggest car rental company in Europe but entered the U.S. market only in 2011. But the German multinational rental company -- with a decided Teutonic flair -- has grown so fast that it is now the fourth-largest car rental company in the U.S., with five locations in Los...