Mercedes Bluetec is diesel that is less polluting than petrol cars.
The special equipment used on the car includes a particulate emission trap as well as the oxidation catalyst. The bluetec car gets its name from the Adblue or urea tank in the rear of the car, which helps in reduction of NOx emission. Liquid urea is added into the exhaust tract and stored in the Selective Catalytic Reduction (SCR) catalyst in the form of ammonia. This ammonia combines with the nitrogen oxide released by the engine to produce harmless nitrogen.
The Adblue tank needs to be topped at service intervals.
Mercedes has a diesel Bluetec Hybrid on the way to better the performance of this vehicle on environment as well as fuel efficiency issues.
Mercedes is not selling this vehicle in India as it needs ultra-low sulphur diesel.