After taking almost five years off from making its E-class sedan available to the American market, the E320 CDI (common-rail direct injection), already widely used throughout Europe, will finally arrive in the U.S. as a 2005 model. In general, diesel engines get 20 to 30 percent better fuel economy while producing significantly less carbon monoxide and dioxide than their gasoline counterparts. New diesels are also far cleaner than the old soot-spewing stereotypes since stricter emission regulations have been imposed. Mercedes' CDI is likewise a performance marvel, supplying constant fuel pressure, which equals power on demand. In fact the E320 CDI produces a staggering 369 lb./ft. of torque. This accelerator immediacy, combined with a 27/37 mpg rating for city and highway driving, plus all of the comfort features that make the E320 a benchmark in its class, should satisfy the discerning consumer who looks to complement luxury with fuel economy.  

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