The Mercedes-Benz G 550 V8 4MATIC, part of the long-wheelbase (W463) G-Class facelift introduced in 2018, represents a significant evolution of the iconic off-road vehicle. Produced from 2018 through 2024, this variant occupies a premium position within the G-Class lineup, offering a blend of luxurious appointments, substantial power, and legendary off-road capability. The “Long” designation refers to the extended wheelbase, providing increased rear passenger space compared to the standard G-Class. This model was primarily aimed at buyers seeking a high-end, capable SUV with a strong brand image, particularly in markets like the United States and the Middle East.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | G-class |
| Generation | G-class Long (W463, facelift 2018) |
| Type (Engine) | G 550 V8 (416 Hp) 4MATIC 9G-TRONIC |
| 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) | 13.8 l/100 km (17 US mpg, 20.5 UK mpg) |
| Fuel consumption (extra urban) | 12.4 l/100 km (19 US mpg, 22.8 UK mpg) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 60 mph | 5.6 sec |
| Emission standard | ULEV125 |
| Weight-to-power ratio | 6.2 kg/Hp, 160.2 Hp/tonne |
| Weight-to-torque ratio | 4.3 kg/Nm, 235 Nm/tonne |
| Power | 416 Hp @ 5250-5500 rpm |
| Power per litre | 104.5 Hp/l |
| Torque | 610 Nm @ 2000-4750 rpm (449.91 lb.-ft. @ 2000-4750 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 176.980 |
| 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 | 10.5:1 |
| 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 | 2596 kg (5723.2 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 | 4818 mm (189.69 in.) |
| Width | 1892 mm (74.49 in.) |
| Width including mirrors | 2187 mm (86.1 in.) |
| Height | 1969 mm (77.52 in.) |
| Wheelbase | 2891 mm (113.82 in.) |
| Front track | 1661 mm (65.39 in.) |
| Rear (Back) track | 1661 mm (65.39 in.) |
| Ride height (ground clearance) | 241 mm (9.49 in.) |
| Minimum turning circle (turning diameter) | 13.6 m (44.62 ft.) |
| Approach angle | 31° |
| Departure angle | 30° |
| Ramp-over (brakeover) angle | 26° |
| Climb angle | 45° |
| Wading depth | 700 mm (27.56 in.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives permanently the four wheels of the vehicle. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 9 gears, automatic transmission G-TRONIC |
| 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 | 275/55 R19 |
| Wheel rims size | 8.5J x 19 |
INTRODUCTION
The 2018-2024 Mercedes-Benz G 550 V8 4MATIC Long represents a significant modernization of the G-Class, while retaining its core off-road DNA. The W463 generation, which began in 1979, received a substantial facelift in 2018, bringing it up to contemporary standards of luxury and technology. The “Long” variant, distinguished by its extended wheelbase, caters to customers prioritizing rear passenger comfort. This G 550 model is positioned above the G 500 in the lineup, offering a more powerful engine and a more luxurious experience. It competes with high-end SUVs like the Range Rover and Cadillac Escalade, appealing to buyers who desire both prestige and off-road prowess.
Powertrain & Engine Architecture
At the heart of the G 550 V8 lies the M176 4.0-liter twin-turbocharged V8 engine. This engine, a cornerstone of Mercedes-AMG’s powertrain lineup, delivers 416 horsepower and 610 Nm (449.91 lb-ft) of torque. The engine utilizes direct fuel injection and a sophisticated valvetrain (DOHC) to optimize combustion efficiency and power delivery. The twin-turbochargers, strategically positioned within the V, minimize turbo lag and provide a broad torque curve. The engine also incorporates cylinder deactivation technology, shutting down cylinders under light load to improve fuel economy.
Power is transmitted to all four wheels via Mercedes-Benz’s 9G-TRONIC nine-speed automatic transmission. This transmission is known for its smooth shifting and wide gear ratio spread, contributing to both fuel efficiency and performance. The 9G-TRONIC is electronically controlled and adapts to driving conditions, selecting the optimal gear for any given situation. The transmission is paired with a full-time four-wheel-drive system, featuring three locking differentials (front, center, and rear) for exceptional off-road capability.
Driving Characteristics
The G 550 V8 offers a unique driving experience. Despite its substantial weight (approximately 5,723 lbs), the powerful V8 engine and the 9G-TRONIC transmission provide brisk acceleration – 0 to 60 mph in around 5.6 seconds. The automatic transmission is well-tuned for both on-road comfort and off-road control. While not as overtly sporty as some competitors, the G 550 delivers ample power for highway passing and merging. The long wheelbase contributes to a more stable and comfortable ride, particularly on uneven surfaces. Off-road, the G 550 truly shines, with its robust four-wheel-drive system and locking differentials allowing it to conquer challenging terrain with ease. The steering, while precise, can feel somewhat heavy, particularly at low speeds.
Equipment & Trim Levels
The G 550 V8 comes standard with a comprehensive array of luxury features. Interior appointments typically include premium leather upholstery, heated and ventilated front seats, a multi-function steering wheel, and a high-end audio system. Standard technology features include a large infotainment display with navigation, Apple CarPlay and Android Auto integration, and a suite of advanced driver-assistance systems (ADAS) such as adaptive cruise control, lane-keeping assist, and automatic emergency braking. Optional extras include a panoramic sunroof, upgraded leather options, and a rear-seat entertainment system. The interior design emphasizes a blend of ruggedness and luxury, with durable materials and a functional layout.
Chassis & Braking
The G 550 V8 utilizes a robust ladder-frame chassis, a design element that has been a hallmark of the G-Class since its inception. This chassis provides exceptional rigidity and durability, essential for off-road performance. The suspension consists of a double-wishbone front suspension and a rigid axle rear suspension. The braking system features ventilated discs on all four wheels, providing ample stopping power. Anti-lock braking system (ABS) is standard, along with electronic stability control. The G 550’s substantial weight necessitates a robust braking system to ensure safe and controlled stopping distances.
Market Reception & Comparison
The 2018-2024 G 550 V8 was generally well-received by automotive critics. Praise was directed towards its powerful engine, luxurious interior, and legendary off-road capability. However, some critics noted its high price tag and relatively poor fuel economy (13.8 l/100 km urban, 12.4 l/100 km extra urban). Compared to the G 500, the G 550 offered a significant performance upgrade with the V8 engine. Compared to other luxury SUVs, the G 550 stood out for its unique styling and unmatched off-road prowess. Reliability has been generally good, although the complexity of the engine and drivetrain can lead to higher maintenance costs.
Legacy
The Mercedes-Benz G 550 V8 4MATIC Long has cemented its place as a highly desirable and collectible SUV. Its combination of luxury, performance, and off-road capability has made it a favorite among enthusiasts and celebrities alike. On the used car market, these models hold their value well, reflecting their enduring appeal and robust build quality. The M176 engine, while complex, has proven to be relatively reliable when properly maintained. The W463 facelift represents a pivotal moment in the G-Class’s history, bridging the gap between its utilitarian origins and its modern-day status as a luxury icon.
