Mercedes CLS 53 Gets EQ Boost

Mercedes is releasing a new range of engines in its current models with much needed lower emissions and better power delivery. The new engine range comes with an EQ Boost system that promises better driving excitement and lower fuel consumption. Here we see one of the Mercedes-AMG tuned 53-series models, the new CLS and later we will share the information on the revised E-Class Coupé plus E-Class Cabriolet which all deliver (combined fuel consumption: 8.5 – 8.4 l/100 km; combined CO2 emissions: 204 – 200 g/km).

PRESS Release: They combine powerful performance with sporty style and high efficiency. At their heart lies a new, electrified 3.0-liter engine featuring twin-turbocharging by means of an exhaust gas turbocharger and an electric auxiliary compressor. The 6‑cylinder in-line engine generates 435 hp and delivers maximum torque of 520 Nm. Its EQ Boost starter-alternator momentarily provides an additional 16 kW of output plus 250 Nm of torque and furthermore feeds the 48 V on-board electrical system. Other technical highlights include the AMG SPEEDSHIFT TCT 9G transmission and the fully variable all-wheel drive system AMG Performance 4MATIC+.

Distinguishing features which are common to the three new 53-series models comprise the twin-blade radiator grille, the front apron in A-wing design, the AMG-specific side sill panels, the rear apron with diffuser insert plus the round exhaust tailpipe trim elements in high-gloss chrome.

“With the new 53-series models we are extending our portfolio in a first step towards a hybridised future with a leading-edge combination of sporty design, performance and efficiency. The basis for this is a contemporary drive configuration in the form of a six-cylinder in-line engine with electric auxiliary compressor, EQ Boost starter-alternator and 48 V on-board electrical system. The very spontaneous response to accelerator pedal input, the precision and the design focusing on driving dynamics are hallmark features of AMG As such we are providing an additional lifestyle-oriented customer group with a further attractive offering from Affalterbach”, explains Tobias Moers, Chairman of the Board of Management of Mercedes-AMG GmbH.

The six-cylinder in-line engine is characterised by top-of-the-range performance and intelligent electrification. The EQ Boost starter-alternator combines a starter motor and alternator in a powerful electric motor and is fitted between the engine and transmission. This innovation as well as the intelligent charging via an electric auxiliary compressor and an exhaust gas turbocharger all have the same goal: to enhance the hallmark AMG performance and driving dynamics, while at the same time reducing fuel consumption and emissions.

And this move has been a successful one: the CLS 53 4MATIC+ accelerates from zero to 100 km/h in just 4.5 seconds, and with the Driver’s package achieves a top speed of 270 km/h. The combined fuel consumption is 8.4 l/100 km, and the combined CO2 emissions 200 g/km. (see table detailing technical data for figures for E-Class 53-series models).

High torque without lag

Supported by the EQ Boost starter-alternator when moving off, the electric auxiliary compressor builds up a high charge pressure without any delay, for a faster increase in torque for acceleration until the large exhaust gas turbocharger is deployed. As a result the 3.0-liter engine reacts extremely spontaneously and provides a highly dynamic response without turbo lag. An additional bonus is the high level of refinement of the six-cylinder in-line engine.

Paving the way for hybrid functions: 48 V on-board electrical system

The power for the 48 V on-board electrical system is generated by the EQ Boost starter-alternator. The conventional 12 V network is likewise supplied from the new network – using a DC/DC converter. Thanks to the 48 V battery, the overall battery capacity in the vehicle is increased, enabling more electrical energy to be made available ‑ and therefore also allowing innovative functions to be introduced, for example. The 48 V on-board electrical system is therefore paving the way for further hybridisation. An additional advantage: the same power requires only a quarter of the current of a conventional system. The result is that the wiring can be thinner and therefore lighter, which indirectly contributes to saving fuel. The existing 12 V system supplies power to consumers such as lights, cockpit, infotainment displays and control units.

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