Mercedes-Benz USA organized a long distance test with two Smart Fortwo cdis (45 HP) and a Mercedes E 320 BLUETEC (US version) from Los Angeles to the Detroit Auto Show in order to demonstrate the fuel-saving qualities of diesel-powered models in everyday real-world conditions.

Media representatives from Germany, Italy and the US took turns at the wheel of the three cars during the 2,740 mile (4,400 km) long route managing to record an average consumption of 60.3 mpg (3.9 lt/100km) with the two Smart Fortwo cdis and 40.6 mpg (5.8 l/100 km) with the E 320 BLUETEC sedan that’s equipped with a 224 HP strong 3.0l V6 diesel unit. -Image gallery after the jump