Paris Motor Show News: 2011 Mercedes S250 CDI BlueEfficiency

2011 Mercedes-Benz S250 CDI BlueEfficiencyMercedes has revealed its new S250 CDI BlueEfficiency, which the company claims is the most fuel-efficient production luxury car, at the Paris motor show. It achieves a fuel economy of 48mpg on the combined cycle and emits 149g/km of CO2, which Mercedes claims makes it the first in its class to dip under the 150g/km mark.It is the first S-class to be