Mercedes Benz is launching a fleet of fuel-efficient SUVs using alternative fuels and new technology that translates into 20 to 30 percent greater fuel efficiency than existing gasoline-powered engines.

BlueTEC, a technology that uses cleaner diesel made from biofuels, will be used in three 2009 SUV models: the ML320, GL320 and R320.

BlueTEC uses an AdBlue injection process that greatly reduces the amount of nitrogen oxide emitted by vehicles. In fact, up to 80 percent of nitrogen oxide never hits the atmosphere through Ad Blue technology, helping to prevent increased air pollution and particles known to cause smog.

BlueTEC is described by the U.S. Internal Revenue Service as an "advanced lean burn technology,” more efficient than current  partial zero emission vehicles like the Ford Focus. The SUVs also qualify for tax credits similar to those offered with hybrid vehicles.

One benefit of using a biofuel vehicle in preference to a hybrid is the way in which fuel efficiency is achieved. Hybrid vehicles generate battery power through a driver’s brake usage. Biodiesel vehicles maintain a constant fuel efficiency level that does not depend on variable driving patterns. Thus, these SUVs prove to be good for the environment, as well as for luxury car owners who want the flexibility and power of a sport vehicle.