var addthis_pub="mastersairab Volkswagen's L1 Diesel-Electric Hybrid Concept Returns 170mpg! .fullpost{display:inline;} The Frankfurt Motor Show marked the world debut of the new Volkswagen L1 Concept, a cigar-shaped diesel-electric hybrid that draws inspiration from Wolfsburg's original 1-litre concept car that was unveiled back in April 2002. Despite its name