Pour­ing petrol on it

Wheels (Australia) - - First Drives -

While we weren’t able to sam­ple the S350 and S400 ver­sions at the in­ter­na­tional launch, we did drive the 320kw S500 with a new 3.0-litre in­line six petrol engine paired to a 48-volt elec­tri­cal sys­tem that runs the starter, wa­ter pump, and air-con com­pres­sor, thereby elim­i­nat­ing power-sap­ping pul­leys and belts. The engine also uses an elec­tric com­pres­sor, which uses 48V juice to add boost be­fore the con­ven­tional tur­bocharger spools up. The en­gi­neers claim the sys­tem de­liv­ers 10 to 15 per­cent ef­fi­ciency gains, and en­ables a smoother auto stop/start sys­tem.

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