On-road performance generally isn’t a priority for off-road SUVs—see Jeep Wrangler, Toyota Land Cruiser, or the original Land Rover Defender. But the G-Class has a lot to offer drivers who stick to pavement.
The G-Class comes in two flavours. Our test car was the base G550, sporting a 4.0-litre twin-turbocharged V8 engine (Mercedes-Benz calls this the V8 biturbo) making 416 horsepower and 450 pound-feet of torque. Four-wheel drive (4WD) and a nine-speed automatic transmission are standard on both G-Class models. The G550 will go from zero to 100 km/h in 5.9 seconds.
Mercedes also offers an AMG G63 model, with a souped-up version of the twin-turbo V8 drivetrain making 577 hp and 627 lb-ft of torque. This is essentially the same powertrain used in most other Mercedes-AMG V8 models, including the high-performance AMG GT sports car. The G63 will do zero to 100 km/h in 4.5 seconds, according to Mercedes. Top speed is electronically limited to 209 kilometres per hour in the G550 and 220 km/h in the G63.
Add in the roar from the optional sport exhaust system (part of the Sport Package), and the G550 felt like an old school American muscle car. Knowing that sound and accelerative force are being generated by a German luxury SUV was just plain hilarious.
Despite being a tall, heavy vehicle design for off-roading, the Mercedes-Benz G550 also handled backroads and highways well. Maybe it was the result of low expectations, but the steering felt remarkably precise for a vehicle like this, and the optional adaptive damping did a good job of taming body roll. In its recent redesign, Mercedes also gave the G-Class independent front suspension, which helps a lot with placing the car on the road. The G550 will never be confused with a sports car, but this should at least give drivers more confidence when piloting one down a narrow, twisty road.
The G550’s tallness and broad, flat, sides also seemed made for catching crosswinds on highways, but the G-Wagen felt rock solid. Ride quality was fairly comfortable, albeit with the occasional shudder over broken pavement. Those shudders are a reminder that the G-Class still uses body-on-frame construction, rather than the unibody design of most other current SUVs, including the equally off-road-focused Land Rover Defender. That gives the Land Rover a smoother ride, although the Mercedes still has the better steering.
If you decide to risk getting mud on your leather upholstery, the G550 has the tools for serious off-roading. It comes standard with low range and front, centre, and rear locking differentials, with switches placed prominently on the dashboard. If you need to use all of that stuff, you are well off the beaten path.
Mercedes claims the G-Class can ford 70 cm of water, and the SUV’s 26-degree breakover angle is better than that of a Jeep Wrangler Unlimited Rubicon. The Jeep has better approach and departure angles, however, owing to its shorter front and rear overhangs. The G550 boasts 24 cm of maximum ground clearance, compared to 27 cm for the Jeep.