The Mercedes-Benz G 55 AMG Long, produced between June 2004 and July 2006, represents a high-performance iteration of the iconic G-Class (W463) series, specifically the facelifted model introduced in 2000. This variant, distinguished by its supercharged 5.4-liter V8 engine, occupied the top echelon of the G-Class lineup, offering a blend of luxurious appointments, formidable off-road capability, and substantial power. The “Long” designation refers to the extended wheelbase, providing increased rear passenger space compared to the standard G-Class. It was primarily marketed towards affluent buyers seeking a unique and capable luxury SUV, with a significant presence in Europe and increasingly, in the United States.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | G-class |
| Generation | G-class Long (W463, facelift 2000) |
| Type | AMG G 55 V8 Kompressor (476 Hp) 4MATIC Automatic |
| Start of production | June, 2004 |
| End of production | July, 2006 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Off-road vehicle |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 21.9 l/100 km (10.7 US mpg, 12.9 UK mpg, 4.6 km/l) |
| Fuel consumption (extra urban) | 13.1 l/100 km (18 US mpg, 21.6 UK mpg, 7.6 km/l) |
| Fuel consumption (combined) | 16.3 l/100 km (14.4 US mpg, 17.3 UK mpg, 6.1 km/l) |
| CO2 emissions | 392 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0-100 km/h | 5.6 sec |
| Acceleration 0-62 mph | 5.6 sec |
| Acceleration 0-60 mph | 5.3 sec |
| Acceleration 0-200 km/h | 25.3 sec |
| Maximum speed | 210 km/h (130.49 mph) – Electronically limited |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 5.2 kg/Hp, 192.3 Hp/tonne |
| Weight-to-torque ratio | 3.5 kg/Nm, 282.8 Nm/tonne |
| Power | 476 Hp @ 6100 rpm |
| Power per litre | 87.5 Hp/l |
| Torque | 700 Nm @ 2650-4500 rpm (516.29 lb.-ft. @ 2650-4500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 113.993 |
| Engine displacement | 5439 cm3 (331.91 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 97 mm (3.82 in.) |
| Piston Stroke | 92 mm (3.62 in.) |
| Compression ratio | 9:1 |
| Number of valves per cylinder | 3 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Supercharger, Intercooler |
| Valvetrain | SOHC |
| Engine oil capacity | 8 l (8.45 US qt | 7.04 UK qt) |
| Coolant capacity | 13 l (13.74 US qt | 11.44 UK qt) |
| Kerb Weight | 2475 kg (5456.44 lbs.) |
| Max. weight | 3200 kg (7054.79 lbs.) |
| Max load | 725 kg (1598.35 lbs.) |
| Trunk (boot) space (min) | 480 l (16.95 cu. ft.) |
| Trunk (boot) space (max) | 2250 l (79.46 cu. ft.) |
| Fuel tank capacity | 96 l (25.36 US gal | 21.12 UK gal) |
| Max. roof load | 200 kg (440.92 lbs.) |
| Permitted trailer load (braked) | 3360 kg (7407.53 lbs.) |
| Permitted trailer load (unbraked) | 750 kg (1653.47 lbs.) |
| Length | 4662 mm (183.54 in.) |
| Width | 1864 mm (73.39 in.) |
| Height | 1931 mm (76.02 in.) |
| Wheelbase | 2850 mm (112.2 in.) |
| Front track | 1475 mm (58.07 in.) |
| Rear track | 1475 mm (58.07 in.) |
| Ride height (ground clearance) | 205 mm (8.07 in.) |
| Minimum turning circle | 13.3 m (43.64 ft.) |
| Approach angle | 37° |
| Departure angle | 31° |
| Ramp-over angle | 23° |
| Climb angle | 38.7° |
| Wading depth | 500 mm (19.69 in.) |
| Drivetrain Architecture | ICE drives all four wheels permanently |
| Drive wheel | All wheel drive (4×4) |
| Number of gears | 5 |
| Gearbox type | Automatic transmission |
| Front suspension | Coil spring, Rigid axle, Trailing arm |
| Rear suspension | Rigid axle, Trailing arm, Coil spring |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Cone worm with recirculation balls |
| Power steering | Hydraulic |
| Tires size | 285/55 R 18 |
| Wheel rims size | 9.5 J x 18 |
Powertrain & Engine Architecture
The heart of the G 55 AMG Long is the M113.993 5.4-liter V8 engine. This engine, a cornerstone of AMG’s performance lineup in the early 2000s, features a Lysholm-type supercharger, providing instant boost and a broad torque curve. The engine utilizes a three-valve per cylinder (three intake, two exhaust) SOHC valvetrain and multi-port fuel injection. The supercharger, along with an intercooler, significantly increases the engine’s output compared to naturally aspirated versions. The engine is longitudinally mounted in the front of the vehicle. The 5-speed automatic transmission (specifically the 722.6) was chosen for its robustness and ability to handle the substantial torque output. While not the most modern transmission by today’s standards, it was well-suited to the G-Class’s intended use and provided smooth, albeit not lightning-fast, shifts.
Driving Characteristics
The G 55 AMG Long delivers a unique driving experience. Despite its size and weight (over 5,400 lbs), the supercharged V8 provides brisk acceleration – 0-60 mph in around 5.3 seconds. The automatic transmission, while not offering manual control, is programmed for performance, holding gears longer and downshifting readily under throttle. The G-Class’s traditional ladder-frame chassis and solid axles contribute to a firm ride, particularly noticeable on uneven surfaces. However, the long wheelbase and well-tuned suspension mitigate some of the harshness. Compared to the standard G-Class models with smaller engines, the G 55 offers a dramatically different level of performance and refinement. The 1.8L or 2.7L diesel variants, for example, prioritized fuel economy and torque for off-road use, while the G 55 focused on outright power and a more luxurious experience.
Equipment & Trim Levels
The G 55 AMG Long came standard with a comprehensive list of luxury features. Interior appointments included premium leather upholstery, wood trim, and heated front seats. Standard equipment also included automatic climate control, a premium audio system, and power-adjustable seats. The “Long” variant specifically offered increased rear legroom, making it more comfortable for passengers. Optional extras included a sunroof, upgraded audio systems, and various customization options through AMG’s designo program, allowing buyers to personalize the interior with unique leather colors and trim materials.
Chassis & Braking
The G-Class retains its traditional body-on-frame construction, providing exceptional durability and off-road capability. The suspension utilizes coil springs and solid axles front and rear, offering substantial wheel travel. The G 55 AMG Long is equipped with ventilated disc brakes on all four wheels, providing ample stopping power. An Anti-lock Braking System (ABS) is standard. The chassis is reinforced compared to standard G-Class models to handle the increased power and torque of the AMG engine.
Market Reception & Comparison
The G 55 AMG Long was generally well-received by automotive critics, who praised its unique combination of luxury, performance, and off-road capability. However, its high price tag and relatively poor fuel economy (around 14 mpg combined) were noted drawbacks. Compared to other high-performance SUVs of the era, such as the Porsche Cayenne Turbo, the G 55 offered a more rugged and distinctive aesthetic, along with superior off-road prowess. However, the Cayenne Turbo generally offered more refined on-road handling and a more modern interior.
Legacy
The Mercedes-Benz G 55 AMG Long has become a sought-after vehicle in the used car market, particularly among collectors and enthusiasts. The M113 engine, while known for its complexity, is generally considered reliable when properly maintained. Common maintenance items include regular oil changes, supercharger service, and attention to cooling system components. The G-Class’s robust construction and timeless design have ensured its enduring appeal, and the G 55 AMG Long remains a symbol of luxury and capability.
