Together with the launch of the new generation E-Class, Mercedes paved the way for a future range of diesel engines. The first unit to brake the ice is a 2.0 litre four cylinder engine, that already replaces the 2.2 liter diesel found in the E220d version. The unit, internally named OM 654, is the first all-aluminium four-cylinder diesel engine from Mercedes-Benz, available form this spring.
There are plans for several output variants as well as longitudinal and transverse installation in vehicles with front-, rear- and all-wheel drive.
The new diesel engine is designed to meet future emissions legislation (RDE – Real Driving Emissions). In contrast to the current NEDC measurement cycle, the WLTP (Worldwide harmonized Light vehicles Test Procedure) cycle is aimed at ensuring that the figures for standard and real-world consumption are close together in future.
The improvements list is long and includes insulation measures and improved catalyst coatings. This means there is absolutely no need for engine temperature management during cold starting or at low load. In addition to the advantages in terms of emissions, this results in fuel savings, especially on short journeys.
The new engine is equipped with multiway exhaust gas recirculation (EGR). This combines cooled high-pressure and low-pressure EGR.
The bottom line is that the new engine delivers around 13 percent lower fuel consumption and CO2 emissions along with a further increase in output (143 kW instead of 125 kW), meaning 191 hp.