Going on sale this summer, the all-new 2018 Mercedes-Benz E400 Coupe joins the sedan and wagon as the latest member of the popular E-Class family. Based technically on the sedan, the new Coupe grows beyond its former subcompact dimensions, stretched by nearly 5”, significantly improving interior spaciousness and comfort, particularly in terms of rear seat room. This 4-seater is now better suited for longer journeys. Its performance is derived from …