Mercedes E320 Blue TEC 2009: thorough test
On the way comes the new generation E-Class, but before that happens we
tested the greenest variant of Mercedes midsize sedans.
Talk about a Diesel car inevitably means having to focus on the environmental benefits involved. And more in the case of a model like the E320 Blue TEC, where the innate quality of all Class E of Merced is a compendium of links technologies aimed at lowering emissions to meet the exacting standards of the State of California. If the state of "Governator" is more demanding emissions with what is, in their time, reviled Diesel engines.
The result has led to a curious association between Diesel and quality cars, because although there are few passenger car diesel powered licensed to sell across the country, there are extraordinary and include a range of technological solutions to make them more powerful, more economical and less polluting. In the case of the E320 Blue TEC, we do a little nuance.
Technically the car cannot be sold in California, and in the other eleven states that follow the guidelines of the CARB (California Air Resources Board). However, in 2007 Mercedes received a sort of Californian government exemption that allowed him to market this model in leasing in the next two years. At the end of the regime of leasing, the vehicle may not be resold or California or any of the other 11 states (Maine, Vermont, Massachusetts, Rhode Island, Connecticut, New York, New Jersey, Pennsylvania, Maryland, Oregon, Washington, and Arizona) that follow the California standard.
Without Ad Blue the E320 CDI E320 Blue TEC replaced. Regarding this, it also had a V6 turbo diesel engine and common rail direct injection, Mercedes made a number of mechanical modifications to reduce nitrogen oxide emissions to the atmosphere, the main problem with diesel engines to meet the LEV II or Tier 2 Bin 5. Without going into lengthy detail, changed the piezo injectors to improve combustion and fuel compression ratio, introduced a new exhaust system, a new turbocharger and a new engine management.
This Mercedes E320 Blue TEC has not called Ad Blue technology, which do incorporate the ML320, GL320 and R320 Blue TEC and which enable them to be sold throughout the United States. Basically, this system reduces the emission of nitrogen oxides consists in injecting a urea solution (Ad Blue) a selective reduction catalyst. There, in the walls of the SCR, the urea is converted into ammonia by contact with the noxious nitrogen oxides nitrogen becomes much more benign to the atmosphere. This technology itself be incorporated into new Class E 2010, with E320 Blue TEC that the future will be approved to be sold in all 50 states.
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