Launched in 2018 as a ground-up redesign that deliberately kept the old W463 chassis code (Mercedes has never explained why, beyond declining to confirm the W464 designation several outlets guessed at).[1] Almost nothing carried over from the outgoing car except the headlamp washers, the push-button door handles and the spare-wheel cover; underneath, the recirculating-ball steering gave way to a rack-and-pinion system, solid front axle to independent suspension, and the body grew in every dimension while somehow weighing about 170 kg less.
The two figures worth reading carefully here both come from US-market press figures given only in horsepower and pound-feet, not kW or N⋅m: the G 63’s 577 hp and 627 lb-ft, and the base G 500’s 416 hp and 450 lb-ft. Both are converted directly from the imperial figure with the conversion factor stated on the field; neither the G 63’s claimed 0–60 mph time nor its 149 mph top speed is treated as a 0–100 km/h figure, and the acceleration claim is omitted rather than guessed at.