The Mercedes-Benz G 550 Long (W465), introduced for the 2024 model year, represents the latest iteration of the iconic G-Class, blending legendary off-road capability with modern luxury and a mild-hybrid powertrain. Positioned as a premium offering within the G-Class lineup, the G 550 Long caters to buyers seeking both uncompromising performance and a spacious, refined interior. The “Long” designation refers to the extended wheelbase, providing increased rear passenger legroom compared to the standard G-Class. This variant builds upon the robust foundation of the W465 platform, incorporating advanced technology and a sophisticated drivetrain.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | G-class |
| Generation | G-class Long (W465) |
| Type | G 550 (443 Hp) Mild Hybrid 4MATIC 9G-TRONIC |
| Start of production | 2024 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Off-road vehicle |
| Seats | 5 |
| Doors | 5 |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.4 sec |
| Acceleration 0 – 62 mph | 5.4 sec |
| Acceleration 0 – 60 mph | 5.3 sec |
| Maximum speed | 210 km/h (130.49 mph) |
| Weight-to-power ratio | 5.4 kg/Hp, 183.8 Hp/tonne |
| Weight-to-torque ratio | 4.3 kg/Nm, 232.4 Nm/tonne |
| Battery voltage | 48 V |
| Battery technology | Lithium-ion (Li-Ion) |
| Electric motor power | 20 Hp |
| Electric motor Torque | 200 Nm (147.51 lb.-ft.) |
| Electric motor location | Between the combustion engine and the transmission |
| Power | 443 Hp @ 6100 rpm |
| Power per litre | 147.7 Hp/l |
| Torque | 560 Nm @ 1950-5500 rpm (413.03 lb.-ft. @ 1950-5500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 256 |
| Engine displacement | 2999 cm3 (183.01 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 83 mm (3.27 in.) |
| Piston Stroke | 92.4 mm (3.64 in.) |
| Compression ratio | 10.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Turbocharger and Electric Powered Compressor, Intercooler |
| Valvetrain | DOHC, CAMTRONIC |
| Engine systems | Start & Stop System, Particulate filter |
| Kerb Weight | 2410 kg (5313.14 lbs.) |
| Max. weight | 3200 kg (7054.79 lbs.) |
| Max load | 790 kg (1741.65 lbs.) |
| Trunk (boot) space – minimum | 640 l (22.6 cu. ft.) |
| Trunk (boot) space – maximum | 2010 l (70.98 cu. ft.) |
| Fuel tank capacity | 100 l (26.42 US gal | 22 UK gal) |
| Max. roof load | 150 kg (330.69 lbs.) |
| Permitted trailer load with brakes (12%) | 3500 kg (7716.18 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 140 kg (308.65 lbs.) |
| Length | 4825 mm (189.96 in.) |
| Width | 1931 mm (76.02 in.) |
| Width including mirrors | 2187 mm (86.1 in.) |
| Height | 2042 mm (80.39 in.) |
| Wheelbase | 2890 mm (113.78 in.) |
| Front track | 1638 mm (64.49 in.) |
| Rear (Back) track | 1638 mm (64.49 in.) |
| Front overhang | 885 mm (34.84 in.) |
| Rear overhang | 849 mm (33.43 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 | ICE and electric motor permanently drive all four wheels, mixed mode operation. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 9 gears, automatic transmission G-TRONIC |
| Front suspension | Double wishbone, Independent coil spring, Transverse stabilizer |
| Rear suspension | Rigid axle suspension, Transverse stabilizer, Coil spring |
| Front brakes | Ventilated discs, 354×32 mm |
| Rear brakes | Ventilated discs, 345×22 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 265/60 R18 |
| Wheel rims size | 7.5J x 18 |
Powertrain & Engine Architecture
The G 550 Long is powered by Mercedes-Benz’s M 256 3.0-liter inline-six engine, incorporating both turbocharging and an electric auxiliary compressor. This configuration delivers 443 horsepower at 6,100 rpm and 560 Nm (413.03 lb-ft) of torque between 1,950 and 5,500 rpm. The engine utilizes direct fuel injection and a DOHC valvetrain with CAMTRONIC variable valve timing. Crucially, this engine features a 48-volt mild-hybrid system, employing an integrated starter-generator (ISG) that provides power assistance, enables smoother start/stop functionality, and contributes to improved fuel efficiency. The ISG adds 20 horsepower and 200 Nm (147.51 lb-ft) of torque. Power is transmitted to all four wheels via a nine-speed 9G-TRONIC automatic transmission.
Driving Characteristics
The combination of the powerful inline-six engine, the 9G-TRONIC transmission, and the 4MATIC all-wheel-drive system results in a surprisingly agile driving experience for a vehicle of its size and weight. Acceleration from 0 to 60 mph is achieved in approximately 5.3 seconds. The 9G-TRONIC transmission offers smooth and responsive gear changes, although some drivers may find it less engaging than a traditional manual gearbox. The mild-hybrid system provides a noticeable boost in low-speed acceleration, enhancing responsiveness in urban driving conditions. The G 550 Long’s long wheelbase contributes to a comfortable ride, but it also slightly reduces maneuverability in tight spaces compared to the standard G-Class.
Equipment & Trim Levels
The G 550 Long comes standard with a high level of equipment, including leather upholstery, heated and ventilated front seats, a premium sound system, and a comprehensive suite of driver-assistance features. The interior features a modern dashboard design with dual 12.3-inch digital displays. Optional extras include a variety of interior trim options, advanced driver-assistance systems, and off-road-focused packages. The extended wheelbase provides significantly more rear legroom, making it a more comfortable option for passengers.
Chassis & Braking
The G 550 Long utilizes a robust ladder-frame chassis, a hallmark of the G-Class lineage, providing exceptional strength and durability. The suspension consists of a double-wishbone independent setup at the front and a rigid axle suspension with coil springs and a transverse stabilizer at the rear. Braking is handled by ventilated discs on all four wheels, with ABS standard. The suspension is tuned to balance on-road comfort with off-road capability, providing a composed ride on paved surfaces while maintaining excellent articulation for tackling challenging terrain.
Market Reception & Comparison
The G 550 Long has been well-received by critics and consumers alike, praised for its blend of luxury, performance, and off-road capability. Compared to other trims in the G-Class lineup, the G 550 Long offers a more refined and spacious interior, making it an ideal choice for buyers who prioritize passenger comfort. While fuel economy is not a primary strength, the mild-hybrid system helps to mitigate some of the engine’s thirst. Reliability is generally considered to be good, although the complexity of the powertrain and electronics may require specialized maintenance.
Legacy
The Mercedes-Benz G-Class has established itself as an icon in the automotive world, renowned for its ruggedness, durability, and timeless design. The W465 generation, and specifically the G 550 Long variant, continues this legacy by offering a modern and sophisticated take on the classic G-Class formula. The M 256 engine and 9G-TRONIC transmission are expected to provide long-term reliability, while the mild-hybrid system enhances efficiency and reduces emissions. On the used car market, the G 550 Long is expected to hold its value well, appealing to collectors and enthusiasts seeking a unique and capable luxury SUV.
