Mercedes-AMG has updated its GLE and GLS SUVs with an all-new V8 engine. Both models now come with a motorsport-inspired flat-plane-crank twin-turbo powerhouse. It is a 4.0-litre V8, producing 604 hp and 627 lb-ft of torque. It’s paired with a 48V mild-hybrid system that adds a subtle 23 hp boost while smoothing out power delivery. […]

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