TrueBlueSolutions refers to a package of measures from Mercedes-Benz used to pursue the goal of emission-free mobility. One of these measures is BlueEFFICIENCY, which is found in three B-Class models (B 160 BlueEFFICIENCY, B 180 BlueEFFICIENCY and B 180 NGT BlueEFFICIENCY). This technology helps to reduce fuel consumption by up to twelve per cent. This is achieved by features such as reduced air resistance, tyres with low rolling resistance, lightweight materials and the automatic ECO start/stop function (B 160 BlueEFFICIENCY and B 180 BlueEFFICIENCY) or the ability to choose between natural gas and petrol operation (B 180 NGT BlueEFFICIENCY).