The Mercedes-Benz GLE 300d 4MATIC, produced from 2021 to 2023, represents a significant iteration of the V167 GLE SUV generation. Positioned as a mid-range offering within the GLE lineup, this variant combined a diesel engine with mild-hybrid technology, aiming to balance performance, fuel efficiency, and refinement. It served as a popular choice in European and other markets where diesel engines remained prevalent, offering a compelling alternative to gasoline-powered GLE models and competing SUVs from BMW, Audi, and Volvo. The 300d EQ Boost utilized Mercedes-Benz’s 48-volt mild-hybrid system to enhance both fuel economy and driving experience.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | GLE |
| Generation | GLE SUV (V167) |
| Type | GLE 300d (272 Hp) EQ Boost 4MATIC 9G-TRONIC |
| Start of production | 2021 |
| End of production | 2023 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | SUV |
| Seats | 5-7 |
| Doors | 5 |
| Combined fuel consumption (WLTP) | 6.1-7.5 l/100 km (38.6 – 31.4 US mpg) |
| CO2 emissions (WLTP) | 160-196 g/km |
| Fuel consumption (NEDC) | 5.8-6.3 l/100 km (40.6 – 37.3 US mpg) |
| CO2 emissions (NEDC) | 152-166 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 6.8 sec |
| Acceleration 0 – 62 mph | 6.8 sec |
| Acceleration 0 – 60 mph | 6.5 sec |
| Maximum speed | 230 km/h (142.92 mph) |
| Emission standard | Euro 6D-ISC-FCM |
| Weight-to-power ratio | 8.1 kg/Hp |
| Weight-to-torque ratio | 4 kg/Nm |
| Gross battery capacity | 0.9 kWh |
| Battery voltage | 48 V |
| Battery technology | Lithium-ion (Li-Ion) |
| Electric motor power | 20 Hp |
| Electric motor Torque | 200 Nm (147.51 lb.-ft.) |
| Power | 272 Hp @ 4200 rpm |
| Torque | 550 Nm @ 1800-2200 rpm (405.66 lb.-ft. @ 1800-2200 rpm) |
| Engine displacement | 1993 cm3 (121.62 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 82 mm (3.23 in.) |
| Piston Stroke | 94.3 mm (3.71 in.) |
| Compression ratio | 15.5:1 |
| Fuel injection system | Diesel Commonrail |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant capacity | 13.3 l (14.05 US qt | 11.7 UK qt) |
| Kerb Weight | 2205 kg (4861.19 lbs.) |
| Max. weight | 3000 kg (6613.87 lbs.) |
| Max load | 795 kg (1752.67 lbs.) |
| Trunk (boot) space – minimum | 630 l (22.25 cu. ft.) |
| Trunk (boot) space – maximum | 2055 l (72.57 cu. ft.) |
| Fuel tank capacity | 85 l (22.45 US gal | 18.7 UK gal) |
| AdBlue tank | 31.6 l (8.35 US gal | 6.95 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (12%) | 2700 kg (5952.48 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Length | 4924 mm (193.86 in.) |
| Width | 1947 mm (76.65 in.) |
| Width including mirrors | 2157 mm (84.92 in.) |
| Height | 1772 mm (69.76 in.) |
| Wheelbase | 2995 mm (117.91 in.) |
| Front track | 1685 mm (66.34 in.) |
| Rear track | 1705 mm (67.13 in.) |
| Ride height (ground clearance) | 185-205 mm (7.28 – 8.07 in.) |
| Minimum turning circle | 12.02 m (39.44 ft.) |
| Front suspension | Double wishbone, Air Suspension – Optional |
| Rear suspension | Independent multi-link suspension, Air Suspension – Optional |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Gearbox | 9 gears, automatic transmission G-TRONIC |
INTRODUCTION
The Mercedes-Benz GLE 300d 4MATIC, launched in 2021, is a diesel-powered SUV belonging to the V167 GLE generation. This model year marked a significant update for the GLE, incorporating advanced technology and a focus on efficiency. The 300d variant specifically targeted buyers seeking a balance between performance and fuel economy, leveraging a 2.0-liter four-cylinder diesel engine augmented by a 48-volt mild-hybrid system. It occupied a middle ground in the GLE range, positioned below the more powerful GLE 450 and above the base models (where available depending on the market). The V167 platform, shared with the GLS, underpinned the GLE’s spacious interior and comfortable ride.
Powertrain & Engine Architecture
At the heart of the GLE 300d lies the OM 654.820, a 2.0-liter inline-four cylinder diesel engine. This engine is a highly advanced design, featuring a cast iron block, aluminum cylinder head, and a sophisticated commonrail direct injection system operating at pressures up to 2,700 bar. The engine utilizes a bi-turbocharger setup – a small turbocharger for quick response at low engine speeds and a larger turbocharger for increased power at higher RPMs. The valvetrain employs double overhead camshafts (DOHC) with four valves per cylinder. The EQ Boost system adds a 48-volt integrated starter-generator (ISG) which provides an additional 20 horsepower and 200 Nm (147.51 lb-ft) of torque, assisting the engine during acceleration and enabling smoother start/stop operation. The ISG also recovers energy during braking, contributing to improved fuel efficiency. The engine is mated to Mercedes-Benz’s 9G-TRONIC nine-speed automatic transmission, known for its smooth shifting and wide gear ratio spread.
Driving Characteristics
The GLE 300d 4MATIC delivers a refined and capable driving experience. While not as overtly sporty as the higher-powered GLE variants, the 272 horsepower and 550 Nm (405.66 lb-ft) of torque provide ample power for everyday driving and highway cruising. The EQ Boost system effectively fills in torque gaps, resulting in a more responsive feel, particularly during acceleration from a standstill. The 9G-TRONIC transmission is well-tuned, offering seamless gear changes and contributing to a relaxed driving experience. The 0-60 mph time of around 6.5 seconds is respectable for a mid-size SUV. Compared to the GLE 450, the 300d offers less outright performance, but its lower weight and efficient engine contribute to better fuel economy. The 300d also feels more manageable and less prone to wheelspin than higher-horsepower models, especially in inclement weather, thanks to the 4MATIC all-wheel-drive system.
Equipment & Trim Levels
The GLE 300d 4MATIC typically came well-equipped as standard. Interior features generally included MB-Tex artificial leather upholstery, power-adjustable front seats, a dual 12.3-inch display screen (instrument cluster and infotainment system), and Mercedes-Benz’s MBUX infotainment system with voice control. Standard safety features included automatic emergency braking, lane keeping assist, and blind spot monitoring. Optional extras included genuine leather upholstery, heated and ventilated seats, a panoramic sunroof, a Burmester surround sound system, and advanced driver-assistance systems like adaptive cruise control and lane change assist. Trim levels varied by market, but generally offered packages that bundled popular options together.
Chassis & Braking
The GLE 300d 4MATIC utilizes a double-wishbone front suspension and an independent multi-link rear suspension. Air suspension was often available as an option, providing a more comfortable ride and the ability to adjust ride height. The 4MATIC all-wheel-drive system is full-time, distributing torque between the front and rear axles for optimal traction. Braking duties are handled by ventilated discs on all four wheels. ABS (Anti-lock Braking System) and electronic stability control are standard features. The suspension tuning is geared towards comfort, but the GLE 300d still offers reasonably controlled handling. Stabilizer bars are fitted front and rear to reduce body roll during cornering.
Market Reception & Comparison
The GLE 300d 4MATIC was generally well-received by automotive critics. Reviewers praised its comfortable ride, refined interior, and fuel-efficient engine. The mild-hybrid system was also noted as a positive feature, contributing to improved responsiveness and reduced emissions. Compared to its competitors, the GLE 300d offered a compelling combination of luxury, technology, and efficiency. Fuel economy figures of 6.1-7.5 l/100 km (38.6 – 31.4 US mpg) were competitive within its class. However, some critics noted that the 2.0-liter diesel engine could feel strained under hard acceleration, and the overall driving experience wasn’t as engaging as some of its sportier rivals.
Legacy
The OM 654 engine family, used in the GLE 300d, has proven to be a reliable and durable powerplant. While long-term reliability data is still accumulating, early indications suggest that the engine is robust and capable of high mileage. The 9G-TRONIC transmission has also demonstrated good reliability. On the used car market, the GLE 300d 4MATIC represents a good value proposition, offering a luxurious and well-equipped SUV at a competitive price point. Its fuel efficiency and relatively low running costs make it an attractive option for buyers seeking a practical and economical luxury SUV.
