According to Wikipedia: "The Mercedes-Benz G-Class or G-Wagen (as it was called from 1979 to 2014 in some areas), short for Gelandewagen (or cross-country vehicle), is a four-wheel drive full-size luxury sport utility vehicle (SUV) produced by Steyr-Puch (now Magna Steyr) in Austria and manufacturing by Mercedes-Benz. The G-wagen is characterized by its boxy styling and body-on-frame construction. It uses three fully locking differentials, one of the few vehicles to have such a feature. Despite the introduction of an intended replacement, the unibody crossover SUV Mercedes-Benz GL-Class in 2006, the G-Class is still in production and is one of the longest produced Mercedes-Benz in Daimler's history, with a span of 32 years. Only the Unimog beats it."