Only a Mercedes G-Class can be better than a Mercedes G-Class. This is the credo followed by the developers with the Mercedes-Benz G 63 AMG 6×6, and they are now stepping up a gear with the G 500 4×4² (show car). The basic recipe for this overcomer of everything is simple: take the superior all-wheel-drive powertrain including portal axles from the 6×6 – take away one axle – and blend it all with a newly-developed variable chassis and the series-production G-Class body.
The 4.0 litre V8 biturbo engine in the G 500 4×4² stands out for its sublime power delivery, the targeted lightweight construction, as well as its high efficiency. The newly developed eight-cylinder features twin turbochargers which are not mounted on the outside of the cylinder banks but rather inside the V configuration – what is known as the ‘hot inside V’. The advantages lie in the compact engine design, the optimum response and the low exhaust gas emissions. The piezo direct petrol injection used exclusively at Mercedes-Benz is responsible for the mixture formation. The spray-guided combustion process has been enhanced in the third generation to meet all future statutory requirements. In series production, the highly efficient and economical 4.0-litre V8 biturbo engine would meet the Euro 6 emission standard, including the maximum particulate emissions level that will not take effect until 2016.
The V8 crankcase consists of an aluminium alloy and ensures maximum strength with the lowest possible weight. The cylinder walls in NANOSLIDE technology are twice as hard as conventional cast-iron cylinder liners, minimise the inner friction and thus the fuel required and facilitate maximum mileages. NANOSLIDE was developed by Daimler starting in the year 2000 and has so far been used successfully and reliably in over 200,000 engines since 2006.
Twin sidepipes on both sides in front of the rear wheels modulate the G-typical sound of the G 500 4×4² and master the entire repertoire of potent sports cars – from soft mumbling in neutral through sonorous humming in the partial-load range to emphatic booming when accelerating under full load. A welcome side effect of the sidepipes: there is improved off-road capability, because in the rear area there are none of the usual rear silencers, which could otherwise restrict the angle of departure.
The Mercedes-Benz G-Class development department located in Graz is the centre of competence where all things “G” are concerned and is responsible for the development and series support of the legendary cross-country vehicle. Furthermore, Graz in Austria has been the production location for all civilian and commercial G-Class vehicles since 1979. Whether and when the decision on series production of the Mercedes-Benz G 500 4×4² will be made depends on the reaction which the near-series show car receives.
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