The Mercedes-Benz G 500 V8 4MATIC, part of the long-wheelbase (W463) G-Class facelift introduced in 2008, represents a significant iteration of the iconic off-road vehicle. Produced through 2010, this variant combined the G-Class’s legendary capability with a powerful 5.5-liter V8 engine and a sophisticated 7G-TRONIC automatic transmission. Positioned as a premium offering within the G-Class range, it catered to buyers seeking both luxurious comfort and robust performance, both on and off-road. The “Long” designation refers to the extended wheelbase, providing increased rear passenger space compared to the standard G-Wagen.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | G-class |
| Generation | G-class Long (W463, facelift 2008) |
| Type (Engine) | G 500 V8 (388 Hp) 4MATIC 7G-TRONIC |
| Start of production | 2008 |
| End of production | 2010 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Off-road vehicle |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (economy) – urban (NEDC) | 19.3 l/100 km (12.2 US mpg, 14.6 UK mpg, 5.2 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 12 l/100 km (19.6 US mpg, 23.5 UK mpg, 8.3 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 14.7 l/100 km (16 US mpg, 19.2 UK mpg, 6.8 km/l) |
| CO2 emissions (NEDC) | 351 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6.1 sec |
| Acceleration 0 – 62 mph | 6.1 sec |
| Acceleration 0 – 60 mph | 5.8 sec |
| Maximum speed | 210 km/h (130.49 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 5.9 kg/Hp, 168.3 Hp/tonne |
| Weight-to-torque ratio | 4.3 kg/Nm, 229.9 Nm/tonne |
| Power | 388 Hp @ 6000 rpm |
| Power per litre | 71 Hp/l |
| Torque | 530 Nm @ 2800-4800 rpm (390.91 lb.-ft. @ 2800-4800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 273.963 |
| 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.) |
| 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 | 2305 kg (5081.66 lbs.) |
| Max. weight | 3200 kg (7054.79 lbs.) |
| Max load | 895 kg (1973.14 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) |
| Max. roof load | 200 kg (440.92 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 | 4662 mm (183.54 in.) |
| Width | 1760 mm (69.29 in.) |
| Width including mirrors | 2007 mm (79.02 in.) |
| Height | 1931 mm (76.02 in.) |
| Wheelbase | 2850 mm (112.2 in.) |
| Front track | 1475 mm (58.07 in.) |
| Rear (Back) track | 1475 mm (58.07 in.) |
| Front overhang | 783 mm (30.83 in.) |
| Rear overhang | 820 mm (32.28 in.) |
| Ride height (ground clearance) | 205 mm (8.07 in.) |
| Minimum turning circle (turning diameter) | 13.3 m (43.64 ft.) |
| Approach angle | 36° |
| Departure angle | 27° |
| Climb angle | 38.7° |
| Wading depth | 500 mm (19.69 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 |
| Front suspension | Coil spring, Rigid axle suspension |
| Rear suspension | Rigid axle suspension, 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 Steering |
| Tires size | 265/60 R18 |
| Wheel rims size | 7.5J x 18 |
Powertrain & Engine Architecture
The heart of the G 500 V8 is the M 273.963 engine, a 5.5-liter naturally aspirated V8. This engine utilizes a three-valve per cylinder (two intake, one exhaust) DOHC valvetrain and multi-port fuel injection. The M273 engine family was known for its smooth power delivery and relatively high efficiency for a V8 of its era. The engine produces 388 horsepower at 6000 rpm and 530 Nm (390.91 lb-ft) of torque between 2800 and 4800 rpm. The engine is longitudinally mounted in the chassis. Paired with the engine is the 7G-TRONIC automatic transmission, a seven-speed unit that offered smoother shifts and improved fuel economy compared to earlier five-speed automatics. The 7G-TRONIC allowed for closer gear ratios, optimizing the engine’s power band for both on-road cruising and off-road crawling.
Driving Characteristics
The G 500 V8 offered a unique driving experience. While the G-Class’s body-on-frame construction and solid axles contributed to a somewhat truck-like ride quality, the V8 engine and 7G-TRONIC transmission provided ample power and refined shifting. Acceleration to 60 mph was achieved in around 5.8 seconds, making it surprisingly quick for a vehicle of its size and weight. The automatic transmission was well-suited to both relaxed highway driving and demanding off-road conditions. Compared to the G 320 CDI diesel variant, the G 500 V8 offered significantly more horsepower and a more responsive throttle, but at the cost of considerably lower fuel economy. The 7G-TRONIC’s gear ratios were optimized for both acceleration and fuel efficiency, providing a balance between performance and economy.
Equipment & Trim Levels
The G 500 V8 came standard with a generous array of features, reflecting its premium positioning. Standard equipment typically included leather upholstery, automatic climate control, power-adjustable front seats, a premium audio system, and a sunroof. The long-wheelbase model specifically offered increased rear legroom, enhancing passenger comfort. Optional extras included a variety of interior trim options, upgraded audio systems, and off-road-focused equipment such as a locking differential and skid plates. The G-Class was highly customizable, allowing buyers to tailor the vehicle to their specific preferences.
Chassis & Braking
The G 500 V8 retained the G-Class’s traditional body-on-frame construction and solid axles, providing exceptional durability and off-road capability. The suspension consisted of coil springs and rigid axles front and rear. Braking duties were handled by ventilated disc brakes on all four wheels, coupled with an Anti-lock Braking System (ABS). The steering system was a recirculating ball system with hydraulic power assistance. The G-Class’s robust chassis and capable suspension allowed it to tackle challenging terrain with ease.
Market Reception & Comparison
The G 500 V8 was generally well-received by automotive critics, who praised its powerful engine, refined transmission, and legendary off-road capability. However, its high price and relatively poor fuel economy were often cited as drawbacks. Compared to the G 320 CDI, the G 500 V8 offered superior performance but significantly lower fuel efficiency. The G 500 V8 appealed to buyers who prioritized performance and luxury over fuel economy and practicality. It was seen as a statement vehicle, representing a blend of capability, exclusivity, and prestige.
Legacy
The M 273 engine, while generally reliable, can require maintenance on its timing chain tensioners and valve cover gaskets as it ages. The 7G-TRONIC transmission is also known to be generally durable, but may require fluid changes and occasional valve body servicing. Today, the G 500 V8 (W463) is a sought-after vehicle in the used car market, particularly among collectors and enthusiasts. Its combination of performance, luxury, and iconic styling has ensured its enduring appeal. Well-maintained examples command premium prices, reflecting the G-Class’s status as a modern classic.
