The Mercedes-Benz G-Class, particularly the long-wheelbase variant introduced with the W463 facelift in 2018, represents the pinnacle of luxury off-road vehicles. The AMG G 63, equipped with a potent 4.0-liter V8 engine and the 9G-TRONIC automatic transmission, is the performance flagship of the G-Class range. Production of this specific configuration ran from 2018 through 2024, solidifying its position as a highly sought-after vehicle in the North American market and globally. This model caters to buyers seeking uncompromising capability combined with opulent comfort and a distinctive, iconic design.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | G-Class |
| Generation | G-Class Long (W463, facelift 2018) |
| Type | AMG G 63 V8 (577 Hp) 4MATIC 9G-TRONIC AMG SPEEDSHIFT TCT (USA) |
| Start of production | 2018 |
| End of production | 2024 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Off-road vehicle |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 18.1 l/100 km (13 US mpg, 15.6 UK mpg, 5.5 km/l) |
| Fuel consumption (extra urban) | 14.7 l/100 km (16 US mpg, 19.2 UK mpg, 6.8 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 60 mph | 4.5 sec |
| Weight-to-power ratio | 4.6 kg/Hp, 217.7 Hp/tonne |
| Weight-to-torque ratio | 3.1 kg/Nm, 320.6 Nm/tonne |
| Power | 577 Hp @ 6000 rpm |
| Power per litre | 144.9 Hp/l |
| Torque | 850 Nm @ 2500-3500 rpm (626.93 lb.-ft. @ 2500-3500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 177.980 |
| Engine displacement | 3982 cm3 (243 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 83 mm (3.27 in.) |
| Piston Stroke | 92 mm (3.62 in.) |
| Compression ratio | 8.6:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | BiTurbo, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 9.5 l (10.04 US qt, 8.36 UK qt) |
| Kerb Weight | 2651 kg (5844.45 lbs.) |
| Trunk (boot) space – minimum | 1079 l (38.1 cu. ft.) |
| Trunk (boot) space – maximum | 1943 l (68.62 cu. ft.) |
| Fuel tank capacity | 100 l (26.42 US gal, 22 UK gal) |
| Permitted trailer load with brakes (12%) | 3175 kg (6999.68 lbs.) |
| Length | 4874 mm (191.89 in.) |
| Width | 1984 mm (78.11 in.) |
| Width including mirrors | 2187 mm (86.1 in.) |
| Height | 1966 mm (77.4 in.) |
| Wheelbase | 2891 mm (113.82 in.) |
| Front track | 1654 mm (65.12 in.) |
| Rear (Back) track | 1654 mm (65.12 in.) |
| Ride height (ground clearance) | 241 mm (9.49 in.) |
| Drag coefficient (Cd) | 0.55 |
| Minimum turning circle (turning diameter) | 13.5 m (44.29 ft.) |
| Approach angle | 31° |
| Departure angle | 30° |
| Ramp-over (brakeover) angle | 26° |
| Climb angle | 45° |
| Wading depth | 700 mm (27.56 in.) |
| Drivetrain Architecture | All wheel drive (4×4). Internal Combustion engine. |
| Number of gears and type of gearbox | 9 gears, automatic transmission G-TRONIC AMG SPEEDSHIFT TCT |
| Front suspension | Double wishbone |
| Rear suspension | Rigid axle suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 275/50 R20 |
| Wheel rims size | 9.5J x 20 |
INTRODUCTION
The W463 G-Class, particularly the facelifted version introduced in 2018, represents a significant evolution of the iconic “Gelandewagen.” The AMG G 63 variant, with its hand-built AMG engine, is the performance leader. Built in Graz, Austria, the G-Class maintains its body-on-frame construction, a key element of its legendary off-road prowess. The 2018 facelift brought substantial upgrades to the interior, technology, and refinement, while retaining the G-Class’s rugged aesthetic. In the US market, the G 63 is positioned as an ultra-luxury SUV, appealing to buyers who desire both exclusivity and capability.
Powertrain & Engine Architecture
The heart of the AMG G 63 is the M 177.980 4.0-liter V8 engine. This engine utilizes a “hot-vee” configuration, meaning the turbochargers are located within the V of the engine, resulting in a more compact design and improved responsiveness. It features direct fuel injection, a sophisticated valvetrain with four valves per cylinder (DOHC), and twin turbochargers with intercooling. The engine produces 577 horsepower at 6000 rpm and a substantial 850 Nm (626.93 lb-ft) of torque between 2500 and 3500 rpm. This power is delivered through the 9G-TRONIC AMG SPEEDSHIFT TCT automatic transmission, a nine-speed automatic known for its quick and smooth shifts. The transmission features a torque converter lockup clutch for improved efficiency and a dedicated AMG programming for enhanced performance.
Driving Characteristics
The AMG G 63 delivers a surprisingly agile driving experience for a vehicle of its size and weight. The 4.5-second 0-60 mph acceleration is remarkable, and the engine provides a broad, flat torque curve that makes overtaking effortless. The 9G-TRONIC transmission is well-matched to the engine, providing quick and precise shifts. While the G-Class is capable on pavement, its true strength lies in its off-road abilities. The full-time four-wheel-drive system, three locking differentials, and robust suspension allow it to tackle extremely challenging terrain. Compared to lower-powered G-Class variants, the G 63 offers a significantly more engaging and dynamic driving experience, albeit with a trade-off in fuel economy.
Equipment & Trim Levels
The AMG G 63 comes standard with a comprehensive list of luxury and performance features. Interior appointments include premium leather upholstery, AMG sport seats, and carbon fiber trim. Standard technology includes a large infotainment screen with Apple CarPlay and Android Auto integration, a premium sound system, and a suite of advanced driver-assistance systems. Optional extras include a variety of interior customization options, such as different leather colors and trim materials, as well as performance upgrades like AMG performance exhaust systems. The G 63 is positioned as the top-of-the-line G-Class model, offering a level of luxury and performance not found in other trims.
Chassis & Braking
The G-Class retains its traditional body-on-frame construction, providing exceptional strength and durability. The suspension consists of a double-wishbone front suspension and a rigid axle rear suspension. The AMG G 63 features an adaptive damping system that allows the driver to adjust the suspension firmness to suit their driving preferences. Braking duties are handled by ventilated discs on all four wheels, providing ample stopping power. The AMG G 63 also includes an anti-lock braking system (ABS) and electronic stability control (ESC) for enhanced safety.
Market Reception & Comparison
The AMG G 63 has been widely praised by automotive critics for its combination of luxury, performance, and off-road capability. It has consistently been a top seller in the ultra-luxury SUV segment. Compared to other high-performance SUVs, the G 63 stands out for its unique styling and rugged character. While its fuel economy is relatively poor (13-16 mpg combined), this is generally considered acceptable given its performance and capabilities. Lower-powered G-Class models, such as the G 550, offer a more comfortable and fuel-efficient driving experience, but lack the G 63’s outright performance.
Legacy
The AMG G 63 (W463 facelift) has established itself as a modern classic, representing a unique blend of heritage and innovation. The M 177 engine has proven to be a robust and reliable powerplant, although maintenance costs can be high due to the vehicle’s complexity and specialized components. On the used car market, these models command a premium price, reflecting their desirability and limited availability. The G 63’s enduring appeal lies in its ability to deliver an unparalleled driving experience, both on and off the road, and its status as a symbol of luxury and adventure.
