With the ML and GL so closely related, it’s fitting that much of what you’ll find in the ML63 AMG is carried over to the GL63. The AMG V-8 of the present age, a direct-injected 5.5-liter V-8 with two turbochargers, provides the GL63 with 550 hp and 560 lb-ft of torque. This matches the higher of the two outputs available for the ML63. All-wheel drive is standard, as is a seven-speed automatic transmission featuring Comfort, Sport, and Manual settings. A Controlled Efficiency programówhich defaults to on when in Comfort and is disabled in other modesóactivates an engine stop-start function, deadens throttle-response, and shifts to higher gears earlier. Pointless for an AMG driver? Yes. But not pointless as far as government regulators and CO2 measurers are concerned. All GL63s will be sprung with what AMG calls its Ride Control suspension. It’s the same setup we see on other Benzes: the Airmatic air suspension works in concert with active anti-roll bars. Drivers can select either the Comfort or Sport setting.