The G-Class or G-Wagen, short for Geländewagen (or cross-country vehicle), is a four-wheel drive vehicle SUV. The G-Class is characterized by its boxy styling and body-on-frame construction. It utilizes three fully locking differentials, one of the few vehicles to have such a feature.
The G-Class cars developed 100 hp and 125 hp, respectively, from their four-cylinder engines with 2.3-liter displacement. An automatic transmission transferred engine power to the road.
Source: Wikipedia, 2012