By David Bénard / ETX Studio Here are five concept cars causing a sensation at this year’s Paris motor show, whether for their originality, their technological prowess or sometimes even their outlandishness. Here are five concept cars causing a sensation at this year’s Paris motor show, whether for their originality, their technological prowess or sometimes even their outlandishness. Renault 4Ever Trophy This concept is undoubtedly the star of the Renault stand. It is a 4L revisited in an electric version which, with its spare wheel and its sand extraction plates, is billed as an SUV for intre…