The V6 diesel engines in the R 300 CDI BlueEFFICIENCY and R 350 CDI 4MATIC deliver smooth operation and huge torque ratings: 440 Nm and 620 Nm provide more than enough power reserves even at low engine speeds. The R 300 CDI BlueEFFICIENCY generates 140 kW, while the R 350 CDI 4MATIC delivers a powerful 195 kW. High performance teams up with low fuel consumption and low pollutant emissions in both these engines.

Impressive features of the new R 350 BlueTEC 4MATIC include smooth running characteristics and low consumption and emission figures. This "clean" diesel with 4MATIC permanent all-wheel drive and AdBlue® urea injection already complies with the EU6 emissions standard (comes into force in 2014). The precise piezo injectors are one of the keys to its economical and clean power delivery.

(R 300 CDI BlueEFFICIENCY: fuel consumption combined: 7.6-7.8 l/100 km, CO2 emissions combined: 199-206 g/km; R 350 BlueTEC 4MATIC: fuel consumption combined: 8.4-8.5 l/100 km, CO2 emissions combined: 222-223 g/km; R 350 CDI 4MATIC: fuel consumption combined: 8.5 l/100 km, CO2 emissions combined: 223 g/km)[1]