BLUETEC – A Blueprint for the World’s Cleanest Diesels
The E320 CDI is now the E320 BLUETEC, which combines several technologies to minimize exhaust emissions.  BLUETEC is built on a foundation of advanced engine design that includes four valves per cylinder, centrally located piezo-electric injectors, third-generation CDI direct injection, a turbocharger with variable nozzle turbine and exhaust gas recirculation.  Central to the E320 BLUETEC is a new 3.0-liter V6 turbodiesel engine producing 208 horsepower and 388 lb.-ft. of torque, which replaces the in-line six found in the previous E320 CDI.


 Next, the BLUETEC system depends on the use of ultra-low-sulfur diesel fuel (less than 15 parts per million) that becomes available throughout the US this fall.  Sulfur is a natural element in most mineral oils that has a corrosive effect on engines as well as increasing particulate emissions.  The availability of very low-sulfur fuel enables the use of reliable particulate filters and efficient nitrogen-oxide after-treatment.

The E320 BLUETEC incorporates four after-treatment units in the exhaust stream – an oxidizing catalytic converter, a particulate filter, an advanced “denox” storage converter, and a SCR catalytic converter.  Called SCR, for selective catalytic reduction, this process creates the most effective method of exhaust gas after-treatment currently available.

To contribute to a discussion about the new 2007 E-Class click here