The Mercedes-Benz G 550 V8 4MATIC, part of the long-wheelbase (W463) G-Class facelift introduced in 2012, represents a significant iteration of the iconic off-road vehicle. Produced through 2015, this variant occupied a premium position within the G-Class lineup, offering a blend of luxurious appointments, substantial power, and the G-Wagen’s 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 marketed in North America and select international markets where demand existed for a more spacious and opulent G-Class experience.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | G-class |
| Generation | G-class Long (W463, facelift 2012) |
| Type (Engine) | G 550 V8 (382 Hp) 4MATIC 7G-TRONIC PLUS |
| Start of production | 2012 |
| End of production | 2015 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Off-road vehicle |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (economy) – urban (EPA) | 19.6 l/100 km (12 US mpg, 14.4 UK mpg, 5.1 km/l) |
| Fuel consumption (economy) – extra urban (EPA) | 15.7 l/100 km (15 US mpg, 18 UK mpg, 6.4 km/l) |
| Fuel consumption (economy) – combined (EPA) | 18.1 l/100 km (13 US mpg, 15.6 UK mpg, 5.5 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 60 mph | 6 sec |
| Maximum speed | 210 km/h (130.49 mph) |
| Weight-to-power ratio | 6.6 kg/Hp, 151 Hp/tonne |
| Weight-to-torque ratio | 4.8 kg/Nm, 209.5 Nm/tonne |
| Power | 382 Hp @ 6000 rpm |
| Power per litre | 70 Hp/l |
| Torque | 530 Nm @ 2800-4800 rpm (390.91 lb.-ft. @ 2800-4800 rpm) |
| Maximum engine speed | 6500 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 273.963, M 273.969 |
| Engine displacement | 5461 cm3 (333.25 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 98 mm (3.86 in.) |
| Piston Stroke | 90.5 mm (3.56 in.) |
| Compression ratio | 10.7:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 9 l (9.51 US qt | 7.92 UK qt) |
| Kerb Weight | 2530 kg (5577.7 lbs.) |
| Max. weight | 3200 kg (7054.79 lbs.) |
| Max load | 670 kg (1477.1 lbs.) |
| Trunk (boot) space – minimum | 480 l (16.95 cu. ft.) |
| Trunk (boot) space – maximum | 2250 l (79.46 cu. ft.) |
| Fuel tank capacity | 96 l (25.36 US gal | 21.12 UK gal) |
| Permitted trailer load with brakes (12%) | 3175 kg (6999.68 lbs.) |
| Length | 4737 mm (186.5 in.) |
| Width | 1760 mm (69.29 in.) |
| Width including mirrors | 2055 mm (80.91 in.) |
| Height | 1951 mm (76.81 in.) |
| Wheelbase | 2850 mm (112.2 in.) |
| Front track | 1514 mm (59.61 in.) |
| Rear (Back) track | 1514 mm (59.61 in.) |
| Ride height (ground clearance) | 205 mm (8.07 in.) |
| Drag coefficient (Cd) | 0.54 |
| Minimum turning circle (turning diameter) | 13.6 m (44.62 ft.) |
| Approach angle | 36° |
| Departure angle | 27° |
| Ramp-over (brakeover) angle | 24° |
| Climb angle | 38.7° |
| Wading depth | 600 mm (23.62 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 | 7 gears, automatic transmission G-TRONIC PLUS |
| Front suspension | Coil spring, Rigid axle suspension, Trailing arm |
| Rear suspension | Rigid axle suspension, Trailing arm, Coil spring |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Cone worm with recirculation balls |
| Power steering | Hydraulic Steering |
| Tires size | 265/60 R18 |
| Wheel rims size | 7.5J x 18 |
INTRODUCTION
The 2012-2015 Mercedes-Benz G 550 V8 Long, built on the W463 platform, represented a continuation of the G-Class’s unique blend of ruggedness and luxury. The facelift introduced in 2012 brought subtle styling updates, improved interior materials, and enhanced technology. The extended wheelbase version, specifically, catered to buyers seeking a more comfortable and spacious cabin without sacrificing the G-Class’s iconic off-road prowess. Positioned as the top-tier G-Class offering in many markets, it sat above the G 350 and offered a significant performance and luxury upgrade.
Powertrain & Engine Architecture
At the heart of the G 550 V8 lies the M273.963 or M273.969 5.5-liter naturally aspirated V8 engine. This engine, a mainstay in many Mercedes-Benz models of the era, features a three-valve-per-cylinder design (two intake, one exhaust) and utilizes multi-port fuel injection. The engine’s architecture is a 90-degree V configuration, contributing to its smooth operation and relatively compact size. The 7G-TRONIC PLUS automatic transmission, a seven-speed unit, was standard. This transmission is known for its smooth shifts and adaptive learning capabilities, optimizing gear selection based on driving style. The transmission’s gear ratios are tuned to balance acceleration with fuel efficiency, though the G 550 V8 is not known for its economy.
Driving Characteristics
The G 550 V8 Long delivers a distinctive driving experience. The substantial torque output of 530 Nm (390.91 lb-ft) available from 2800-4800 rpm provides effortless acceleration, despite the vehicle’s considerable weight. The 0-60 mph sprint takes approximately 6 seconds, which is respectable for a vehicle of this size and type. The 7G-TRONIC transmission contributes to a refined driving experience, although it isn’t as quick-shifting as some modern transmissions. Compared to the smaller G 350, the G 550 V8 offers significantly more power and a more relaxed cruising experience. The extended wheelbase does slightly diminish the G-Class’s agility, but the trade-off in rear passenger space is often considered worthwhile.
Equipment & Trim Levels
The G 550 V8 Long came standard with a comprehensive list of luxury features. Leather upholstery, heated and ventilated front seats, a premium sound system, and automatic climate control were all standard. The interior trim could be customized with various wood and metal options. Optional extras included a sunroof, upgraded navigation system, rear seat entertainment, and various driver-assistance features. The extended wheelbase provided ample legroom for rear passengers, making it a comfortable choice for long journeys.
Chassis & Braking
The G 550 V8 Long retains the G-Class’s traditional body-on-frame construction, providing exceptional durability and off-road capability. The suspension utilizes coil springs and a rigid axle setup at both the front and rear, offering a robust and capable ride. Ventilated disc brakes are used on all four wheels, providing ample stopping power. ABS (Anti-lock braking system) is standard. The G-Class’s high ground clearance (205 mm / 8.07 in.) and impressive approach, departure, and ramp-over angles contribute to its exceptional off-road performance.
Market Reception & Comparison
The G 550 V8 Long was generally well-received by critics, who praised its powerful engine, luxurious interior, and legendary off-road capability. However, its high price tag and relatively poor fuel economy were often cited as drawbacks. Compared to other luxury SUVs, the G 550 V8 Long offered a unique combination of ruggedness and refinement. The G 350, while more fuel-efficient, lacked the G 550’s outright performance. The G 550 also offered a more prestigious image than the base model.
Legacy
The 2012-2015 Mercedes-Benz G 550 V8 Long remains a desirable vehicle in the used car market. The M273 engine, while known for requiring occasional maintenance (such as valve cover gasket replacements), is generally considered reliable. The G-Class’s robust construction and timeless design contribute to its enduring appeal. These vehicles often command high prices, reflecting their exclusivity and iconic status. The G 550 V8 Long represents a sweet spot in the G-Class lineage, offering a blend of classic G-Wagen character with modern luxury and convenience.
