Big wheels keep on turning at Mercedes-Benz U.S. International's (MBUSI) sweet home, Alabama. Its 3.7 million sq.-ft. factory near Tuscaloosa assembles Mercedes SUVs not only for the Lynyrd Skynynds and Neil Youngs of North America, but for customers in 135 markets around the globe. MBUSI builds the Mercedes M-Class sport utility and the full-sized GL-Class luxury SUV. The company also produces the R-Class -- a crossover vehicle styled as a touring wagon, seating up to six adults. After an expansion of the factory, MBUSI can assemble as many as 174,000 vehicles a year. MBUSI is a subsidiary of Mercedes-Benz USA, which is in turn owned by of Germany's Daimler AG.