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,
United Electric Car Company system taking its power supply from studs in the road, it was later converted to run from overhead wires. Preserved in 1976, the tram was painstakingly restored by the Black Country Museum Transport Group over many years and completed in 2004. In 1917 Dick, Kerr & Co., also in Strand Road, Preston, acquired the United Electric Car Co and in 1918 the Company became a part of English Electric. United Electric Car Company The United Electric Car Company was a tramcar manufacturer from 1905 to 1917 in Preston, Lancashire. The Electric Railway and Tramway Carriage Works was formed in 1897