No matter which B-Class model you drive - you will always be making a valuable contribution to protecting the environment. The new B-Class B 170 NGT BlueEFFICIENCY can run on petrol or natural gas. And in the B 150 BlueEFFICIENCY and B 170 BlueEFFICIENCY models, the ECO start/stop function helps to save fuel at traffic lights or in traffic jams.
In the diesel engines, common-rail technology ensures both high torque and low consumption. The common rail keeps the fuel at a permanently high pressure throughout the engine speed range and injects finely atomised, precisely metered quantities of fuel into the combustion chambers. The result is a reduction in fuel consumption and lower pollutant emissions.
 The B 150 and B 170 petrol engines are optional and expected to be available from September 2008 as BlueEFFICIENCY versions with ECO start/stop function.