History of the diesel car featured an aluminium block, DOHC chain driven valvetrain, common rail direct injection and variable geometry turbocharger. In Spring 2005, Mercedes-Benz unveiled their first application of a mass-produced aluminum block diesel engine for passenger vehicles and commercial use. While aluminum is traditionally considered of inferior strength and temperature resistance to withstand diesel applications, Mercedes engineers made extensive use of CAD/CAM design to arrive at an aluminum block that would meet with Mercedes' testing and reliability standards. First use was in 2006 model-year vehicles in the E-Class sedan and ML-class and GL-class SUVs. Similar in weight () to the five-cylinder it replaced,
Edwards Rail Car Company of being up in the car body. Edwards output during the 1930s was mainly export cars including the "modern" streamlined Model-21 and the streamlined version of the Model-10, with their distinctive shovel-nose, first developed by Edwards in 1935. By the late 1930s sales of railcars in the United States was at an all-time low, and with the war in Europe, Edwards sold the plant and new owners re-tooled for defense production in 1940. In 1942 the Edwards Company lost its corporate identity and ceased to exist, rail motor cars and trailers were the only Edwards products manufactured under that name.