Drive system

Thanks to systematic electrification and intelligent downsizing, the new E-Class sets new standards in efficiency. Half of all the models will be fourth-generation plug-in hybrids. The model range already achieves this high proportion at market launch. Three of the six E-Class versions combine the advantages of a vehicle with combustion engine with those of an electric car.

The combustion engines are four and six-cylinder units from the current modular Mercedes-Benz engine family FAME (Family of Modular Engines). Accordingly, the engine range plays a major role in the flexibility of the international production network, with needs-based electrification.

In addition to turbocharging, both the diesel and petrol engines feature intelligent support from an integrated starter-generator (ISG). They are therefore mild hybrids. Thanks to a new battery, the power of the electric motor has been increased from 15 to 17 kW and the boost torque to 205 Nm.

The ISG uses a 48 volt on-board electrical system that ensures functions such as gliding, boosting or energy recovery, and makes significant fuel savings possible. The engines also start very rapidly and comfortably as a result, so that the start/stop function is almost as imperceptible to the driver as the transition from gliding with the engine switched off to strong acceleration under engine power. When idling, the intelligent interaction between the ISG and the combustion engine ensures outstandingly smooth running.

Petrol models: with many innovations compared to the preceding power units

The four-cylinder petrol engine (M 254) is initially available in the Mercedes-Benz E-Class with 150 kW as the E 200 (WLTP: combined fuel consumption: 7.3-6.4 l/100 km, combined CO2 emissions: 166-144 g/km). Further output levels will follow. In the M 254, Mercedes-Benz has combined all the innovations of the FAME modular engine family in a single unit. They include NANOSLIDE® cylinder coating, CONICSHAPE® cylinder honing (trumpet honing) and the exhaust aftertreatment system positioned directly at the engine.

A top model with an electrified in-line six-cylinder will round off the engine range at the top end.

Diesel: current development level

E 220 d (WLTP: combined fuel consumption: 5.5-4.8 l/100 km, combined CO2 emissions: 144-125 g/km) and E 220 d 4MATIC (WLTP: combined fuel consumption: 5.7-4.9 l/100 km, combined CO2 emissions: 149-130 g/km) powered by the OM 654 M. The electrification also includes the use of an electric refrigerant compressor for the air conditioning system.

The OM654M in the E 220 d is charged by a single-stage turbocharger with variable turbine geometry and friction-optimised roller bearings. The turbocharger is tuned so that the engine responds quickly and delivers its power smoothly. The four-cylinder diesel is also up to date in terms of exhaust gas aftertreatment. Its components include:

a close-coupled NOx storage catalytic converter for reducing nitrogen oxides
a DPF (diesel particulate filter with special coating for reducing also the amount of nitrogen oxides)
an SCR catalytic converter (selective catalytic reduction with metered injected quantity of AdBlue®) and
an additional SCR catalytic converter in the vehicle's underbody, with a separately metered injected quantity of AdBlue®
A more powerful variant with a six-cylinder engine will also soon follow in the diesel range.
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