The Mercedes-Benz GLE 450d 4MATIC, part of the C167 GLE Coupe facelift introduced in 2023, represents a blend of performance, luxury, and efficiency within the mid-size SUV coupe segment. This variant, equipped with a 3.0-liter inline-six diesel engine and a mild-hybrid system, occupies a significant position in the GLE lineup, offering a compelling alternative to the gasoline-powered GLE 450 and the higher-performance AMG models. Production began in 2023 and continues as a key offering in Mercedes-Benz’s global portfolio, particularly in European markets where diesel engines remain popular.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | GLE |
| Generation | GLE Coupe (C167, facelift 2023) |
| Type | GLE 450d (367 Hp) EQ Boost 4MATIC 9G-TRONIC |
| Start of production | 2023 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Coupe, SUV |
| Seats | 5 |
| Doors | 5 |
| Combined fuel consumption (WLTP) | 7.5-8.4 l/100 km (31.4 – 28 US mpg, 37.7 – 33.6 UK mpg, 13.3 – 11.9 km/l) |
| CO2 emissions (WLTP) | 197-220 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 5.6 sec |
| Acceleration 0 – 62 mph | 5.6 sec |
| Acceleration 0 – 60 mph | 5.3 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6d-ISC-FCM |
| Weight-to-power ratio | 6.5 kg/Hp, 154.5 Hp/tonne |
| Weight-to-torque ratio | 3.2 kg/Nm, 315.8 Nm/tonne |
| Gross battery capacity | 0.9 kWh |
| Battery voltage | 48 V |
| Battery technology | Lithium-ion (Li-Ion) |
| Battery location | Under the trunk |
| Electric motor power | 20 Hp |
| Electric motor Torque | 200 Nm (147.51 lb.-ft.) |
| Electric motor location | Between the combustion engine and the transmission |
| Power | 367 Hp @ 4000 rpm |
| Torque | 750 Nm @ 1350-2800 rpm (553.17 lb.-ft. @ 1350-2800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine displacement | 2989 cm3 (182.4 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Compression ratio | 15.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | BiTurbo, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 8.5 l (8.98 US qt | 7.48 UK qt) |
| Kerb Weight | 2375 kg (5235.98 lbs.) |
| Max. weight | 3070 kg (6768.19 lbs.) |
| Max load | 695 kg (1532.21 lbs.) |
| Trunk (boot) space – minimum | 655 l (23.13 cu. ft.) |
| Trunk (boot) space – maximum | 1790 l (63.21 cu. ft.) |
| Fuel tank capacity | 85 l (22.45 US gal | 18.7 UK gal) |
| Max. roof load | 75 kg (165.35 lbs.) |
| Permitted trailer load with brakes (12%) | 2700 kg (5952.48 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 108 kg (238.1 lbs.) |
| Length | 4941 mm (194.53 in.) |
| Width | 2018 mm (79.45 in.) |
| Width including mirrors | 2157 mm (84.92 in.) |
| Height | 1716 mm (67.56 in.) |
| Wheelbase | 2935 mm (115.55 in.) |
| Front track | 1680 mm (66.14 in.) |
| Rear track | 1728 mm (68.03 in.) |
| Front overhang | 925 mm (36.42 in.) |
| Rear overhang | 1081 mm (42.56 in.) |
| Ride height (ground clearance) | 205 mm (8.07 in.) |
| Minimum turning circle | 11.87 m (38.94 ft.) |
| Front suspension | Double wishbone, Transverse stabilizer, Air Suspension – Optional |
| Rear suspension | Independent multi-link suspension, Transverse stabilizer, Air Suspension – Optional |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Gearbox | 9 gears, automatic transmission G-TRONIC |
| Tires size | 275/50 R20 |
| Wheel rims size | 20 |
Powertrain & Engine Architecture
The heart of the GLE 450d is the OM656 3.0-liter inline-six diesel engine. This engine represents a significant advancement in diesel technology, featuring a stepped combustion process and a two-stage turbocharging system. The first turbocharger provides immediate response at low engine speeds, while the second turbocharger delivers increased power at higher RPMs. The engine utilizes a diesel commonrail fuel injection system, operating at extremely high pressures to ensure efficient combustion and reduced emissions. The 48-volt mild-hybrid system, designated EQ Boost, adds a 20 horsepower electric motor integrated between the engine and the 9G-TRONIC automatic transmission. This system provides a brief power boost during acceleration, enables smoother start/stop functionality, and allows for coasting with the engine shut off to improve fuel economy. The 9G-TRONIC transmission, a nine-speed automatic, is known for its smooth shifting and wide gear ratio spread, optimizing both performance and efficiency.
Driving Characteristics
The GLE 450d 4MATIC delivers a refined and capable driving experience. The 750 Nm (553 lb-ft) of torque, available from a low 1350 rpm, provides strong acceleration and effortless overtaking. While not as overtly sporty as the AMG variants, the 450d offers a more than adequate 0-60 mph time of around 5.3 seconds. The 9G-TRONIC transmission contributes to a comfortable ride, with seamless gear changes. The EQ Boost system provides a subtle but noticeable improvement in responsiveness. Compared to the gasoline-powered GLE 450, the 450d offers superior fuel economy and a more relaxed cruising experience. The inline-six diesel is noticeably quieter and smoother than older diesel engines, minimizing the typical diesel clatter.
Equipment & Trim Levels
The GLE 450d typically comes well-equipped as standard. Features include Mercedes-Benz User Experience (MBUX) infotainment system with a large touchscreen display, leather upholstery, heated front seats, automatic climate control, and a comprehensive suite of safety features like adaptive cruise control, lane keeping assist, and automatic emergency braking. Optional extras include air suspension (providing a more comfortable ride), premium sound systems, panoramic sunroof, and various interior trim upgrades. The GLE Coupe’s interior design emphasizes luxury and modernity, with high-quality materials and a driver-focused layout.
Chassis & Braking
The GLE 450d utilizes a sophisticated chassis design. The front suspension features a double-wishbone setup, while the rear employs an independent multi-link suspension. Air suspension is often an optional upgrade, providing adjustable ride height and improved comfort. The 4MATIC all-wheel-drive system ensures excellent traction in all weather conditions. Braking duties are handled by ventilated discs on all four wheels, providing ample stopping power. The electronic stability program (ESP) and anti-lock braking system (ABS) are standard features, enhancing safety and control.
Market Reception & Comparison
The GLE 450d has been generally well-received by automotive critics. It’s praised for its blend of performance, efficiency, and comfort. Compared to the GLE 450 gasoline variant, the 450d offers significantly better fuel economy, making it a more practical choice for long-distance driving. While the AMG GLE models provide more exhilarating performance, they come at a higher price point and with increased running costs. The 450d strikes a balance between these extremes, appealing to buyers who prioritize refinement and efficiency without sacrificing performance.
Legacy
The OM656 engine family, found in the GLE 450d, is known for its durability and reliability. The mild-hybrid system adds a layer of complexity, but early reports suggest it has proven to be robust. On the used car market, the GLE 450d is likely to hold its value well due to its desirable combination of features and fuel efficiency. The C167 generation GLE Coupe, including the 450d variant, represents a significant step forward in Mercedes-Benz’s SUV lineup, offering a compelling alternative to traditional SUVs and a stylish, practical option for discerning buyers.
