In terms of the American consumer automobile market, Mercedes-Benz is perhaps the most well-known manufacturer of diesel vehicles. With the exception of Volkswagen, Mercedes-Benz is currently the only automaker manufacturing diesel passenger vehicles intended for sale in the United States.
Mercedes-Benz BlueTEC Technology
As of the 2009 model year, all Mercedes-Benz diesel engines in production will be part of the BlueTEC engine series. The series was created in response to stricter diesel emissions regulations mandated by the EPA in 2006. As part of these regulations, advanced emissions control systems were required on all diesel vehicles manufactured during or after the 2007 model year to facilitate efficient combustion of the newly standardized Ultra-Low Sulfur Diesel.
The BlueTEC moniker refers to the inclusion of two unique emissions-reducing technologies. Both technologies are intended to dramatically reduce the amount of nitrogen oxide released into the atmosphere. The first technology, known as AdBlue, utilizes urea injection to chemically convert nitrogen oxide into harmless water vapor and nitrogen. The second technology, dubbed DeNOX, combines an oxidizing catalytic converter, particulate filter and peripheral systems to further reduce the amount of nitrogen oxide and soot emitted by Mercedes-Benz diesel vehicles.
2008 Mercedes-Benz E320 BlueTEC Engine
Originally built for the 2006 model year, the E320 was the first engine in the BlueTEC series. It is currently the only BlueTEC engine available on a 2008 model year Mercedes-Benz, and is intended for the Mercedes-Benz E-Class. The current incarnation of the engine is a 3.0-liter 24-valve turbocharged V6. The engine musters an impressive 208 horsepower with torque at 400 lb-ft. The engine delivers acceleration from 0 to 60 MPH at 6.8 seconds. Fuel efficiency is reported at 23 MPG for city driving and 32 MPG for highway driving. The 2008 E320 BlueTEC diesel engine is a dual-overhead cam design (DOHC). Click here to view our road test of the 2009 Mercedes-Benz E320 BlueTEC.
2008 Mercedes-Benz GL320 CDI Engine
The current GL320 diesel engine is one of the last in the CDI engine series. The CDI series is considered the predecessor to the BlueTEC engine series, and will be phased out at the end of the 2008 model year. The 2008 GL320 CDI engine is a 3.0-liter turbocharged DOHC 24-valve V6. Top horsepower is 215 horsepower and torque maxes out at 398 lb-ft. The engine is available for the Mercedes-Benz GL-Class SUV.
2008 Mercedes-Benz R320 CDI Engine
The R320 CDI engine is the same CDI engine as the GL320 CDI. Rather than being intended for the GL-Class SUV, the R320 can be found as an engine option on the 2008 Mercedes-Benz R-Class crossover.
2008 Mercedes-Benz ML320 CDI Engine
The same 2008 CDI engine found in the GL-Class and R-Class. The ML320 CDI is an engine option for the 2008 Mercedes-Benz M Class SUV.
List of 2009 Mercedes-Benz Diesel Engines
Mercedes-Benz has announced that the following diesel engines will be available for the 2009 model year:
- Mercedes-Benz E320 BlueTEC (3.0-liter 24-valve turbocharged V6)
- Mercedes-Benz GL320 BlueTEC
- Mercedes-Benz ML320 BlueTEC
- Mercedes-Benz R320 BlueTEC