Powertrain: New engine generation: redefining efficiency

Powerful and efficient petrol and diesel engines, all equipped with the ECO start/stop function and complying with Euro 6 emissions standard, provide for lively performance and great fun at the wheel – including a newly developed four-cylinder diesel engine.
Initially, the E 200 d models of the new E-Class will be available with an all-new four-cylinder diesel engine, while the E 200 will be powered by a four-cylinder petrol engine and the E 350 d by a six-cylinder diesel.
Further model variants will later be added to the range. These will include the E 350 e. This PLUG-IN HYBRID impresses with its dynamism and efficiency, allowing around 30 kilometres of all-electric and therefore locally emission-free driving. Its four-cylinder petrol engine, in conjunction with a powerful electric motor, gives it a total system output of 210 kW (286 hp) with a system torque of 550 Nm. With this set-up, the E 350 e achieves the performance of a sports car yet consumes less fuel than a small, compact-class car.
Further newcomers will be the E 300 rated at 180 kW (245 hp) with a torque of 370 newton metres as well as the E 400 4MATIC, whose six-cylinder petrol engine will deliver 245 kW (333 hp) with a torque of 480 newton metres.
The most important data at a glance
Model
Displacementcc
kW/hp
Nm
0-100 km/h
in s
l/100 km
CO2
g/km
E 200
1991
135/184
300
7.7
5.9
132
E 300
1991
180/245
370
6.3
6.6
149
E 400 4MATIC
3498
245/333
480
5.3
7.7
174
E 220 d
1950
143/194
400
7.3
3.9
102
E 350 d
2987
190/258
620
5.9
5.1
133
E 350 e
System output
1991
210/286
(155+65
211+88)
550
(350+
440)
6.2
2.1
49
All figures provisional
Further variants will later complete the engine range, including the new four-cylinder diesel unit developing 110 kW (150 hp). The range of petrol engines will comprise four-cylinder versions with outputs ranging from 135 to 180 kW (183 to 245 hp) plus a six-cylinder variant developing 245 kW (333 hp).
All engines for the new E-Class are equipped with the ECO start/stop function. The petrol engines meet the requirements of the EU 6 emissions standard, while the new OM 654 four-cylinder diesel engine is already configured with future RDE limits in mind.
All-new four-cylinder diesel engine
The new four-cylinder diesel unit marks the birth of a new Mercedes-Benz engine family and opens up new dimensions in efficiency. Despite having a lower displacement than its predecessor, reduced to just under two litres, and weighing around 16 percent less, the new diesel powerplant has an output of 143 kW/ 194 hp, precisely 18 kW more than the previous engine, and, when installed in the E 220 d, delivers an NEDC combined consumption of 3.9 litres per 100 kilometres, which equates to CO2 emissions of 102 grams per kilometre – a figure that until now only significantly smaller vehicles have been able to deliver. On top of all this, the engine is also more compact than its predecessor.
These advantages have a noticeable effect. The lower weight and extra output give more agility and enhanced driving pleasure; its compact dimensions mean that the engine can be used in a range of different powertrain configurations, as well as for all-wheel-drive and hybrid vehicles.
The engine is also already designed to meet future legislation on emissions (RDE – Real Driving Emissions). In future, exhaust gas aftertreatment systems will not only have to meet the prescribed emission limits on the test stand, but also under a wide range of real-life conditions. The WLTP cycle (Worldwide harmonized Light vehicles Test Procedure), which is scheduled to supersede the NEDC measuring cycle in future, was another focus of attention during the development phase. Over and above this, the design of Mercedes-Benz's new diesel engine offers potential for further development in terms of both output range and integration of further technology modules, for example in order to take advantage of the opportunities presented by further advances in electronics.
Further development of tried-and-tested 6-cylinder diesel engine
The E-Class carries over from the previous model series the 6-cylinder diesel engine with 190 kW output and 620 Nm torque. However, the charge-air cooling has been changed to an air/water system. This contributes to increased agility.
The petrol engines: powerful, fast and clean
The BlueDIRECT four-cylinder petrol engines in the E-Class combine spontaneous response and high output with efficiency and low emissions. Third-generation direct injection with spray-guided combustion. The system pressure is up to 200 bar, the pressure being variably optimised according to the engine's mapping. Piezo injectors enable optimal mixture formation with up to five injections per power stroke.
The third-generation direct injection is supplemented by rapid multi-spark ignition (MSI). The MSI system enables up to four sparks to be discharged in succession within one millisecond, creating a plasma with a larger spatial expansion than conventional ignition.
The rapid multi-spark ignition can be controlled to vary both the timing of the sparks and the combustion period to suit the relevant operating point. This provides scope for optimising the centre of combustion and improved residual gas compatibility. This in turn reduces fuel consumption. The result of this is excellent utilisation of the fuel with minimum emissions.
Nine-speed automatic transmission for more comfort and efficiency
In addition to a 6-speed manual transmission for the four-cylinder petrol engines, Mercedes-Benz offers the new 9G-TRONIC nine-speed automatic transmission as standard for all E-Class models. Its broad ratio spread (9.15) for gears one to nine allows an overall reduction in engine speed ‒ a key factor behind the high level of energy efficiency and ride comfort. Shortened shift and response times ensure optimum immediacy combined with outstanding ease of shifting. This is linked to the transmission's high efficiency, which is a noticeable advantage in terms of fuel consumption.
4MATIC all-wheel drive
For the first time, the E 200, too, will be available with 4MATIC permanent all-wheel drive. It improves traction and driving stability, especially under difficult road conditions. As ever, the combination of the ESP® driving dynamics control system with the 4ETS electronic traction system makes regular differential locks superfluous. This saves weight and noticeably improves handling safety as well as ride comfort.
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