The Mercedes-Benz GLE 450 2.5 (367 hp) EQ Boost 4MATIC, introduced with the V167 facelift in July 2023, represents a significant iteration of Mercedes-Benz’s mid-size luxury SUV. Positioned as a mid-range offering within the GLE lineup, it bridges the gap between the entry-level GLE 350 and the performance-oriented AMG variants. This model incorporates a 48-volt mild hybrid system (EQ Boost) to enhance both fuel efficiency and performance, aligning with increasingly stringent emissions standards and consumer demand for more sustainable luxury vehicles. The V167 generation GLE, launched in 2019, aimed to provide a more comfortable and technologically advanced experience compared to its predecessor, the W166, and the 2023 facelift further refined this approach.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | GLE |
| Generation | GLE SUV (V167, facelift 2023) |
| Type | GLE 450 2.5 (367 Hp) EQ Boost 4MATIC 9G-TRONIC |
| Start of production | July, 2023 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | SUV |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (combined) | 8.9-9.9 l/100 km (26.4 – 23.8 US mpg) |
| CO2 emissions | 209-236 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.9 sec |
| Acceleration 0 – 60 mph | 5.6 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Weight-to-power ratio | 6.4 kg/Hp |
| Battery voltage | 48 V |
| Battery technology | Lithium-ion (Li-Ion) |
| Power | 367 Hp @ 6000 rpm |
| Torque | 500 Nm @ 2000-4000 rpm (368.78 lb.-ft. @ 2000-4000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 256.925 |
| Engine displacement | 2498 cm3 (152.44 cu. in.) |
| Number of cylinders | 6 |
| Cylinder Bore | 83 mm (3.27 in.) |
| Piston Stroke | 77 mm (3.03 in.) |
| Fuel injection system | Direct injection |
| Kerb Weight | 2348-2369 kg (5176.45 – 5222.75 lbs.) |
| Max. weight | 3000 kg (6613.87 lbs.) |
| Trunk space (minimum) | 825 l (29.13 cu. ft.) |
| Trunk space (maximum) | 2055 l (72.57 cu. ft.) |
| Fuel tank capacity | 85 l (22.45 US gal) |
| Length | 4927 mm (193.98 in.) |
| Width | 2018 mm (79.45 in.) |
| Height | 1782-1797 mm (70.16 – 70.75 in.) |
| Wheelbase | 2995 mm (117.91 in.) |
| Number of gears | 9 |
| Gearbox type | Automatic transmission G-TRONIC |
Powertrain & Engine Architecture
The heart of the GLE 450 2.5 is the M 256.925 engine, a 2.5-liter inline-six cylinder gasoline engine. This engine utilizes direct injection and is augmented by both a turbocharger and an electric auxiliary compressor. The electric compressor, powered by the 48-volt system, provides near-instant boost at low engine speeds, mitigating turbo lag and improving throttle response. The engine also features CAMTRONIC variable valve timing and lift adjustment on both intake and exhaust valves, optimizing efficiency and power delivery across the rev range. The EQ Boost system adds a 20 hp electric motor integrated into the transmission, providing additional power during acceleration and enabling a smoother start/stop function. The 9G-TRONIC nine-speed automatic transmission is standard, offering smooth and efficient gear changes. This transmission is designed to handle the combined output of the engine and electric motor, and its wide gear ratio spread contributes to both fuel economy and performance.
Driving Characteristics
The GLE 450 2.5 delivers a refined and capable driving experience. The combination of the turbocharged inline-six and the EQ Boost system results in strong and readily available torque, making for effortless acceleration in everyday driving situations. The 0-60 mph time of around 5.6 seconds is respectable for a mid-size luxury SUV. Compared to the base GLE 350, the 450 offers a noticeable increase in power and responsiveness. While not as overtly sporty as the AMG-tuned models, the GLE 450 provides a comfortable balance between performance and luxury. The 9G-TRONIC transmission is generally smooth and responsive, although some drivers may find it occasionally hesitant during downshifts. The air suspension, standard on this trim, contributes to a comfortable ride quality, effectively absorbing bumps and imperfections in the road.
Equipment & Trim Levels
The GLE 450 2.5 typically comes well-equipped with standard features including Mercedes-Benz User Experience (MBUX) infotainment system with a large touchscreen display, Apple CarPlay and Android Auto integration, heated front seats, a panoramic sunroof, and a suite of advanced driver-assistance systems such as adaptive cruise control, lane-keeping assist, and automatic emergency braking. Interior upholstery is typically MB-Tex leatherette or genuine leather, with a variety of color options available. Optional extras include premium audio systems (Burmester), ventilated front seats, a head-up display, and various styling packages. The interior design emphasizes luxury and modernity, with high-quality materials and a minimalist aesthetic.
Chassis & Braking
The GLE 450 2.5 features a double-wishbone front suspension and an independent multi-link rear suspension, both incorporating air suspension as standard. This air suspension system allows for adjustable ride height and damping settings, enhancing both comfort and handling. The GLE 450 utilizes ventilated disc brakes on all four wheels, providing ample stopping power. Anti-lock braking system (ABS) and electronic stability control (ESC) are standard safety features. The steering is electric power-assisted, offering precise and responsive control.
Market Reception & Comparison
The GLE 450 2.5 was generally well-received by automotive critics, who praised its refined powertrain, comfortable ride, and advanced technology. Compared to the GLE 350, the 450 offered a significant performance upgrade without the higher price tag of the AMG models. Fuel economy, while not exceptional for its class, was considered reasonable, particularly given the vehicle’s size and performance. The EQ Boost system was lauded for its ability to improve both fuel efficiency and responsiveness. Reliability reports have been generally positive, although some owners have reported minor issues with the infotainment system.
Legacy
The Mercedes-Benz GLE 450 2.5 EQ Boost represents a key step in Mercedes-Benz’s transition towards electrified powertrains. The M 256 engine, with its integrated EQ Boost system, showcases the potential of mild hybrid technology to enhance both performance and efficiency. On the used car market, these models are holding their value relatively well, due to their desirable combination of luxury, performance, and technology. The 9G-TRONIC transmission, while complex, has proven to be generally reliable, and the M 256 engine is considered a robust and well-engineered unit. As the automotive industry continues to move towards electrification, the GLE 450 2.5 serves as a transitional model, bridging the gap between traditional internal combustion engines and the future of electric mobility.
