The E320 Bluetec diesel gets vastly superior fuel economy, with EPA
ratings of 23 city/32 highway mpg. Mercedes' first V6 diesel, the
Bluetec features all the latest high-tech goodies, including
turbocharging, a variable nozzle turbine, four valves per cylinder,
exhaust gas recirculation and a third generation of CDI, the
common-rail direct-injection system that delivers fuel to the
engine at an incredible 23,000 psi.