The Mercedes-Benz G-Class Long (W463), specifically the G 320 CDI V6 4MATIC variant with the 7G-TRONIC automatic transmission, was produced from April 2007 to June 2008. This model represents a facelift within the W463 generation, known for its robust off-road capabilities and luxurious appointments. The “Long” designation indicates an extended wheelbase, providing increased rear passenger space compared to the standard G-Class. Positioned as a mid-range offering within the G-Class lineup during its production run, the G 320 CDI bridged the gap between the base G 320 and the higher-performance G 55 AMG, appealing to buyers seeking a blend of capability, comfort, and diesel efficiency.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | G-class |
| Generation | G-class Long (W463, facelift 2007) |
| Type (Engine) | G 320 CDI V6 (224 Hp) 4MATIC 7G-TRONIC |
| Start of production | April, 2007 |
| End of production | June, 2008 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Off-road vehicle |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (economy) – urban (NEDC) | 13.4 l/100 km (17.6 US mpg, 21.1 UK mpg, 7.5 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 9.7 l/100 km (24.2 US mpg, 29.1 UK mpg, 10.3 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 11 l/100 km (21.4 US mpg, 25.7 UK mpg, 9.1 km/l) |
| CO2 emissions (NEDC) | 302 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 9.1 sec |
| Acceleration 0 – 62 mph | 9.1 sec |
| Acceleration 0 – 60 mph | 8.6 sec |
| Maximum speed | 177 km/h (109.98 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 10.6 kg/Hp, 94.5 Hp/tonne |
| Weight-to-torque ratio | 4.4 kg/Nm, 227.8 Nm/tonne |
| Power | 224 Hp @ 3800 rpm |
| Power per litre | 75 Hp/l |
| Torque | 540 Nm @ 1600-2400 rpm (398.28 lb.-ft. @ 1600-2400 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 642.970 |
| Engine displacement | 2987 cm3 (182.28 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 83 mm (3.27 in.) |
| Piston Stroke | 92 mm (3.62 in.) |
| Compression ratio | 17.7:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 8.5 l (8.98 US qt | 7.48 UK qt) |
| Coolant | 11.6 l (12.26 US qt | 10.21 UK qt) |
| Kerb Weight | 2370 kg (5224.96 lbs.) |
| Max. weight | 3200 kg (7054.79 lbs.) |
| Max load | 830 kg (1829.84 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 | 1470 mm (57.87 in.) |
| Rear (Back) track | 1470 mm (57.87 in.) |
| Ride height (ground clearance) | 205 mm (8.07 in.) |
| Minimum turning circle (turning diameter) | 13.3 m (43.64 ft.) |
| Approach angle | 37° |
| Departure angle | 31° |
| Ramp-over (brakeover) angle | 23° |
| 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, Trailing arm |
| Rear suspension | Rigid axle suspension, Trailing arm, Coil spring |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
INTRODUCTION
The G 320 CDI Long, introduced as part of the W463 facelift in 2007, continued the G-Class’s legacy as a supremely capable and luxurious off-road vehicle. The W463 generation, produced from 1990 to 2018, saw the G-Class evolve from a military-focused utility vehicle to a desirable luxury SUV. The facelift brought subtle cosmetic updates, improved interior refinement, and, crucially, the introduction of more modern powertrains, including the OM 642 diesel engine featured in the G 320 CDI. The extended wheelbase “Long” variant catered to customers desiring more rear passenger legroom, making it a popular choice for families and those utilizing the vehicle for chauffeuring purposes.
Powertrain & Engine Architecture
At the heart of the G 320 CDI Long lies the OM 642.970 3.0-liter V6 turbodiesel engine. This engine, a mainstay in many Mercedes-Benz vehicles of the era, is renowned for its robust construction and strong low-end torque. The OM 642 utilizes a common rail direct injection system, delivering fuel at extremely high pressures for optimized combustion and reduced emissions. A variable geometry turbocharger (VGT) with an intercooler further enhances performance and efficiency. The engine features a double overhead camshaft (DOHC) valvetrain with four valves per cylinder, contributing to its smooth operation and power delivery. Paired with the engine is the 7G-TRONIC automatic transmission, a seven-speed unit known for its smooth shifts and wide gear ratio spread. This transmission allows the engine to operate efficiently across a broad range of speeds and driving conditions. The 7G-TRONIC also features a manual shift mode for greater driver control.
Driving Characteristics
The G 320 CDI Long, with its 224 horsepower and 540 Nm (398 lb-ft) of torque, offered a compelling blend of performance and efficiency. While not as overtly powerful as the G 55 AMG, the diesel engine provided ample torque for effortless acceleration and confident towing capabilities. The 7G-TRONIC transmission contributed to a relaxed driving experience, with smooth gear changes and a well-chosen set of ratios. Compared to the standard G 320 with a manual transmission, the automatic version prioritized comfort and ease of use over outright driver engagement. The extended wheelbase did slightly impact agility, but the trade-off in rear passenger space was often considered worthwhile. Off-road, the G 320 CDI Long excelled, leveraging its permanent all-wheel-drive system, three locking differentials, and robust suspension to conquer challenging terrain.
Equipment & Trim Levels
The G 320 CDI Long came standard with a comprehensive array of features, reflecting its luxury positioning. Interior appointments typically included leather upholstery, wood trim, and automatic climate control. Standard safety equipment included ABS brakes, traction control, and multiple airbags. Optional extras were plentiful, allowing buyers to customize their G-Class to their specific preferences. Popular options included a sunroof, upgraded audio system, navigation system, heated seats, and parking sensors. The “Long” variant specifically offered increased rear legroom and often featured power-adjustable rear seats for enhanced comfort.
Chassis & Braking
The G-Class chassis remained largely unchanged from its origins, retaining a ladder-frame construction that provided exceptional strength and durability. The suspension consisted of coil springs and rigid axles front and rear, offering substantial wheel articulation for off-road capability. The G 320 CDI Long utilized ventilated disc brakes at the front and solid discs at the rear, providing adequate stopping power for its weight. Hydraulic power steering offered precise control, although it lacked the direct feel of some contemporary steering systems. The robust chassis and suspension contributed to the G-Class’s renowned ability to handle rough terrain and challenging conditions.
Market Reception & Comparison
The G 320 CDI Long was generally well-received by critics, who praised its blend of luxury, capability, and diesel efficiency. The diesel engine was lauded for its strong torque and relatively good fuel economy compared to the gasoline-powered G 55 AMG. However, some reviewers noted the G-Class’s somewhat dated interior and its relatively high price tag. Compared to the G 55 AMG, the G 320 CDI offered a more practical and economical option, appealing to buyers who prioritized fuel efficiency and everyday usability over outright performance. Compared to other luxury SUVs of the time, the G-Class stood out for its unique styling and exceptional off-road capabilities.
Legacy
The OM 642 engine, found in the G 320 CDI Long, is generally considered a reliable and durable powerplant when properly maintained. Common issues include potential problems with the glow plugs, fuel injectors, and the diesel particulate filter (DPF). The 7G-TRONIC transmission is also generally reliable, but requires regular fluid changes to ensure smooth operation. Today, the G 320 CDI Long is a sought-after vehicle among enthusiasts, particularly those seeking a capable and distinctive off-road SUV. Its combination of luxury, performance, and diesel efficiency makes it a compelling alternative to more common luxury SUVs. Well-maintained examples command a premium in the used car market, reflecting the G-Class’s enduring appeal and iconic status.
