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,
Marmon Motor Car Company single-seater "monoposto" construction layout. While the Marmon Company discontinued auto production, they continued to manufacture components for other auto manufacturers and manufactured trucks. When the Great Depression drastically reduced the luxury car market, the Marmon Car Company joined forces with Colonel Arthur Herrington, an ex-military engineer involved in the design of all-wheel drive vehicles. The new company was called Marmon-Herrington. Marmon-Herrington got off to a successful start by procuring contracts for military aircraft refueling trucks, 4x4 chassis for towing light weaponry, commercial aircraft refueling trucks, and an order from the Iraqi Pipeline Company for what were the largest trucks ever