The Mercedes-Benz G-Class Long (W463, facelift 2018) G 350d 4MATIC, equipped with the 9G-TRONIC automatic transmission, represents a significant iteration of the iconic G-Wagen. Introduced in 2018 as part of the W463’s facelift, this variant aimed to balance the G-Class’s legendary off-road capability with improved refinement and efficiency. Positioned as a mid-range offering within the G-Class lineup, it slotted between the base G 550 (in markets where offered) and the high-performance AMG G 63. Production of this specific configuration continued through 2020, solidifying its place as a desirable and capable luxury SUV.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | G-class |
| Generation | G-class Long (W463, facelift 2018) |
| Type (Engine) | G 350d (286 Hp) 4MATIC 9G-TRONIC |
| Start of production | 2018 |
| End of production | 2020 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Off-road vehicle |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (economy) – urban (NEDC) | 10.8-11 l/100 km (21.8 – 21.4 US mpg, 26.2 – 25.7 UK mpg, 9.3 – 9.1 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 8.9-9.2 l/100 km (26.4 – 25.6 US mpg, 31.7 – 30.7 UK mpg, 11.2 – 10.9 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 9.6-9.8 l/100 km (24.5 – 24 US mpg, 29.4 – 28.8 UK mpg, 10.4 – 10.2 km/l) |
| CO2 emissions (NEDC) | 252-259 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 7.4 sec |
| Acceleration 0 – 62 mph | 7.4 sec |
| Acceleration 0 – 60 mph | 7 sec |
| Maximum speed | 199 km/h (123.65 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 8.3 kg/Hp, 120.4 Hp/tonne |
| Weight-to-torque ratio | 4 kg/Nm, 252.5 Nm/tonne |
| Power | 286 Hp @ 3400-4600 rpm |
| Power per litre | 97.8 Hp/l |
| Torque | 600 Nm @ 1200-3200 rpm (442.54 lb.-ft. @ 1200-3200 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 656.929 |
| Engine displacement | 2925 cm3 (178.49 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 82 mm (3.23 in.) |
| Piston Stroke | 92.4 mm (3.64 in.) |
| Compression ratio | 15.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 9.5 l (10.04 US qt | 8.36 UK qt) |
| Kerb Weight | 2376 kg (5238.18 lbs.) |
| Max. weight | 3150 kg (6944.56 lbs.) |
| Max load | 774 kg (1706.38 lbs.) |
| Trunk (boot) space – minimum | 667 l (23.55 cu. ft.) |
| Trunk (boot) space – maximum | 1941 l (68.55 cu. ft.) |
| Fuel tank capacity | 75 l (19.81 US gal | 16.5 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 | 1969 mm (77.52 in.) |
| Wheelbase | 2890 mm (113.78 in.) |
| Front track | 1638 mm (64.49 in.) |
| Rear (Back) track | 1638 mm (64.49 in.) |
| Front overhang | 877 mm (34.53 in.) |
| Rear overhang | 839 mm (33.03 in.) |
| Ride height (ground clearance) | 241 mm (9.49 in.) |
| Drag coefficient (Cd) | 0.54 |
| Minimum turning circle (turning diameter) | 13.6 m (44.62 ft.) |
| Approach angle | 30.9° |
| Departure angle | 29.9° |
| Ramp-over (brakeover) angle | 25.7° |
| Climb angle | 45° |
| Wading depth | 700 mm (27.56 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 | 9 gears, automatic transmission G-TRONIC |
| Front suspension | Double wishbone |
| Rear suspension | Rigid axle suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 265/60 R18; 275/55 R19; 275/50 R20 |
| Wheel rims size | 7.5J x 18; 8.5J x 19; 8.5J x 20 |
INTRODUCTION
The G 350d, introduced with the 2018 facelift of the W463 G-Class, represented a key offering for Mercedes-Benz in markets where diesel engines remained popular. The “Long” designation indicates the extended wheelbase version of the G-Class, providing increased rear passenger space. This variant aimed to deliver a more refined and efficient G-Class experience without sacrificing the vehicle’s renowned off-road prowess. Built on the robust ladder-frame chassis that defined the G-Class for decades, the G 350d 4MATIC offered a unique blend of luxury, capability, and practicality.
Powertrain & Engine Architecture
At the heart of the G 350d lies the OM 656.929, a 2.9-liter inline-six cylinder diesel engine. This engine is a significant departure from the previous V6 diesel used in the G-Class, featuring advanced technologies like a stepped combustion process and a two-stage turbocharging system. The engine produces 286 horsepower at 3400-4600 rpm and a substantial 600 Nm (442.54 lb.-ft.) of torque between 1200-3200 rpm. Fuel is delivered via a common rail direct injection system, and the engine utilizes a double overhead camshaft (DOHC) valvetrain. The 9G-TRONIC nine-speed automatic transmission is standard, providing smooth and efficient gear changes. This transmission is known for its wide gear ratio spread, contributing to both fuel economy and performance. The transmission’s programming is tailored to the G-Class’s unique characteristics, offering both comfort and control.
Driving Characteristics
The G 350d 4MATIC delivers a surprisingly refined driving experience for a vehicle of its size and capability. The 9G-TRONIC transmission helps to keep the engine in its optimal power band, providing strong acceleration. While not as overtly powerful as the G 63, the G 350d offers ample torque for both on-road overtaking and challenging off-road situations. The long wheelbase contributes to a more stable ride, particularly at highway speeds. The automatic transmission, while smooth, can sometimes feel hesitant during quick downshifts. Compared to the manual transmission options available in some markets on earlier G-Class models, the 9G-TRONIC prioritizes comfort and ease of use over outright driver engagement. The G 350d’s weight (2376 kg / 5238.18 lbs) is noticeable, but the engine’s torque helps to mitigate this.
Equipment & Trim Levels
The G 350d Long typically came well-equipped, reflecting its luxury SUV positioning. Standard features included leather upholstery, heated front seats, a premium sound system, and a comprehensive suite of safety features. The infotainment system featured a high-resolution display screen and Mercedes-Benz’s COMAND interface. Optional extras included a sunroof, upgraded leather options, parking assist systems, and various exterior styling enhancements. Interior trim options allowed for a degree of personalization, with customers able to choose from a range of wood and metal finishes. The extended wheelbase provided significantly more rear legroom compared to the standard G-Class, making it a more comfortable option for passengers.
Chassis & Braking
The G 350d retains the traditional G-Class ladder-frame chassis, providing exceptional strength and durability. The suspension consists of a double wishbone setup at the front and a rigid axle suspension at the rear. This configuration is optimized for both on-road comfort and off-road articulation. Ventilated disc brakes are fitted to all four wheels, providing ample stopping power. An anti-lock braking system (ABS) is standard. The G-Class’s high ground clearance (241 mm / 9.49 in.) and impressive approach, departure, and ramp-over angles contribute to its exceptional off-road capability. The electronic stability program (ESP) helps to maintain control in challenging conditions.
Market Reception & Comparison
The G 350d was generally well-received by automotive critics, who praised its blend of luxury, capability, and improved fuel economy compared to the gasoline-powered G 550. The diesel engine’s torque was particularly appreciated for its ability to handle both on-road and off-road driving. Compared to the G 63, the G 350d offered a more sensible and practical option for buyers who didn’t require the AMG’s extreme performance. Fuel economy, while not exceptional, was a noticeable improvement over the gasoline alternatives. Reliability reports have been generally positive, although the G-Class’s complex systems can be expensive to maintain.
Legacy
The G 350d 4MATIC (W463 facelift) represents a significant chapter in the G-Class’s history. It demonstrated Mercedes-Benz’s commitment to adapting the iconic vehicle to meet changing market demands and environmental regulations. On the used car market, these models are highly sought after, commanding premium prices due to their combination of luxury, capability, and relative rarity. The OM 656 engine has proven to be a robust and reliable powerplant, and the 9G-TRONIC transmission has also demonstrated good long-term durability. The G 350d remains a desirable and capable luxury SUV, appealing to buyers who appreciate its unique character and heritage.
