With the new Performance models based on the GLE, Mercedes-AMG is continuing a precisely 20 year-old tradition: in 1999 the ML55 as the progenitor based on the then M-Class was the top model in the range with its 255 kW (347 hp) V8 engine. The same applies to its current successor in the guise of the Mercedes-AMG GLE63 4MATIC+. The top-of-the-line performer of the model series is naturally taking to the starting line with state-of-the-art engine technology: the AMG 4.0-litre V8 biturbo engine generating 420 kW (571 hp) in the GLE model series and 450 kW (612 hp) in the S version is combined for the first time with the EQ Boost starter-alternator.
This is accompanied by an additional electric output of 16 kW (22 hp), a 48-volt on-board electrical system, cylinder shut-off and petrol particulate filter for optimum efficiency. Furthermore, the fully variable all-wheel drive, the air suspension with adaptive damping adjustment and active roll stabilisation and the extremely fast-shifting TCT 9G transmission further move the limits of vehicle dynamics upwards. On top of this there are the advantages of a luxury SUV: good all-round visibility, plenty of space for passengers and luggage, high-quality materials and the brand's very latest driving assistance, infotainment and connectivity functions. Even more versatility is provided by the improved off-road capabilities with the two additional drive programs "Trail" and "Sand", as well as the variable vehicle level. This is where extreme sportiness, first-class off-road characteristics and absolute day-to-day suitability come together.
With the EQ Boost starter-alternator for the first time: the AMG 4.0-litre V8 biturbo engine
The 4.0-litre V8 biturbo engine in the new GLE63 is fitted for the first time in both output variants (420 kW/571 hp and 450 kW/612 hp) with an integrated EQ Boost starter-alternator. It combines a starter motor and an alternator in a single, powerful electric motor and is integrated between the engine and the transmission to save space. The additional 16 kW (22 hp) of output plus 250 Nm of torque which can be called upon temporarily, does not only enable more spontaneous moving-off characteristics. This is because moreover, this innovative component supplies the 48-volt on-board electrical system, is used as a power generator and also performs hybrid functions. These include boost, recuperate, load point shift, gliding and the virtually imperceptible restarting of the engine with the start/stop function. For the first time, the EQ Boost starter-alternator is also responsible for idle speed control. This allows fuel savings that were previously reserved for high-voltage hybrid technology.
Improved efficiency: the intelligent AMG Cylinder Management
For increased efficiency, Mercedes-AMG has also equipped the V8 engines with cylinder shut-off. In the partial-load range, cylinders two, three, five and eight are deactivated, which crucially reduces the fuel consumption. When the driver has selected the "Comfort" drive program, the cylinder deactivation system is available in the wide engine speed range from 1000 to 3250 rpm. A special display in the instrument cluster indicates whether the cylinder deactivation system is in use and whether the engine is presently operating in four or eight-cylinder mode. The transition between these two operating states is immediate, fast and torque-neutral, so the passengers do not have to relinquish any comfort.
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