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,
DESA (company) The company is also assembling 16V 4000 MTU type diesel engines for a contract for 150 IranRunner locomotives for passenger trains to be manufactured by Siemens and the MLC (Mapna Locomotive Engineering and Manufacturing Company). The first 30 units will be supplied by Siemens, the remaining 120 will be primarily manufactured domestically capacities and expertise over six years. The company has also supplied 120 engines for trainsets, and 60 engines for railbuses. The company also supplies engines for marine use, and dual fuel engines for powerplants. DESA (company) The Iran Heavy Diesel Manufacturing Company ( "Šerkat-e sanʿati wa-tawlidi-ye dizel-e sangin-e