The Mercedes-Benz GLC 400e 4MATIC, introduced in June 2022 as part of the X254 generation GLC SUV, represents a significant step in the brand’s plug-in hybrid (PHEV) technology. Positioned as a mid-to-premium trim level within the GLC lineup, it offers a balance between performance, efficiency, and luxury. The 400e combines a 2.0-liter turbocharged inline-four cylinder gasoline engine with an electric motor, delivering a combined system output of 381 horsepower and 650 Nm (479 lb-ft) of torque. This model is designed to appeal to buyers seeking a sophisticated SUV with the capability of all-electric driving for shorter commutes and reduced emissions.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | GLC |
| Generation | GLC SUV (X254) |
| Type | GLC 400e (381 Hp) Plug-in Hybrid 4MATIC 9G-TRONIC |
| Start of production | June, 2022 |
| Powertrain Architecture | PHEV (Plug-in Hybrid Electric Vehicle) |
| Body type | SUV |
| Seats | 5 |
| Doors | 5 |
| Combined fuel consumption (WLTP) | 0.6-0.8 l/100 km (392 – 294 US mpg, 470.8 – 353.1 UK mpg, 166.7 – 125 km/l) |
| CO2 emissions (WLTP) | 14-19 g/km |
| Fuel Type | Petrol / electricity |
| Acceleration 0 – 100 km/h | 5.6 sec |
| Acceleration 0 – 62 mph | 5.6 sec |
| Acceleration 0 – 60 mph | 5.3 sec |
| Maximum speed | 237 km/h (147.26 mph) |
| Weight-to-power ratio | 6 kg/Hp, 167.1 Hp/tonne |
| Weight-to-torque ratio | 3.5 kg/Nm, 285.1 Nm/tonne |
| Gross battery capacity | 31.2 kWh |
| Battery technology | Lithium-ion (Li-Ion) |
| Battery location | Under the trunk |
| Recuperation output | 100 kW |
| All-electric range (WLTP) | 104-120 km (64.62 – 74.56 mi) |
| Average Energy consumption (WLTP) | 24-26.8 kWh/100 km (38.62 – 43.13 kWh/100 mi, 87 – 78 MPGe, 4.2 – 3.7 km/kWh, 2.6 – 2.3 mi/kWh) |
| Max speed (electric) | 140 km/h (86.99 mph) |
| Electric motor power | 136 Hp |
| Electric motor Torque | 440 Nm (324.53 lb.-ft.) |
| Electric motor location | Between the combustion engine and the transmission |
| System power | 381 Hp |
| System torque | 650 Nm (479.42 lb.-ft.) |
| Power | 252 Hp @ 5800 rpm |
| Torque | 400 Nm @ 2000-3200 rpm (295.02 lb.-ft. @ 2000-3200 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 254 |
| Engine displacement | 1999 cm3 (121.99 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Compression ratio | 10.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-scroll turbo, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 6 l (6.34 US qt | 5.28 UK qt) |
| Kerb Weight | 2280 kg (5026.54 lbs.) |
| Max. weight | 2840 kg (6261.13 lbs.) |
| Max load | 560 kg (1234.59 lbs.) |
| Fuel tank capacity | 49 l (12.94 US gal | 10.78 UK gal) |
| Permitted trailer load with brakes (12%) | 2000 kg (4409.25 lbs.) |
| Permitted towbar download | 100 kg (220.46 lbs.) |
| Length | 4716 mm (185.67 in.) |
| Width | 1890 mm (74.41 in.) |
| Width including mirrors | 2075 mm (81.69 in.) |
| Height | 1648 mm (64.88 in.) |
| Wheelbase | 2888 mm (113.7 in.) |
| Front track | 1627 mm (64.06 in.) |
| Rear (Back) track | 1640 mm (64.57 in.) |
| Drag coefficient (Cd) | 0.29 |
| Minimum turning circle (turning diameter) | 11 m (36.09 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) and the electric motor permanently drive the four wheels of the car with the ability to work in full electric or mixed mode. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 9 gears, automatic transmission G-TRONIC |
| Front suspension | Independent multi-link suspension |
| Rear suspension | Independent multi-link suspension, Air suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
Powertrain & Engine Architecture
At the heart of the GLC 400e lies the M 254 2.0-liter inline-four cylinder engine. This engine utilizes direct fuel injection and a twin-scroll turbocharger to produce 252 horsepower and 400 Nm (295 lb-ft) of torque. The engine’s design prioritizes efficiency and responsiveness. The electric motor, positioned between the engine and the 9G-TRONIC automatic transmission, contributes an additional 136 horsepower and 440 Nm (325 lb-ft) of torque. The combined system output of 381 horsepower and 650 Nm (479 lb-ft) allows for brisk acceleration. The 9G-TRONIC transmission, a nine-speed automatic, is specifically calibrated to work seamlessly with the electric motor, providing smooth and efficient gear changes. The 31.2 kWh lithium-ion battery pack is located under the trunk floor, providing a usable all-electric range of 104-120 km (65-75 miles) under WLTP testing.
Driving Characteristics
The GLC 400e offers a refined driving experience. In electric mode, the vehicle operates silently and provides instant torque, making it ideal for urban driving. Switching to hybrid mode allows the engine and electric motor to work in tandem, delivering strong acceleration and improved fuel economy. The 9G-TRONIC transmission’s gear ratios are optimized for both efficiency and performance, ensuring that the engine remains in its optimal power band. Compared to the GLC 300, the 400e offers significantly more power and torque, resulting in quicker acceleration. While the added weight of the battery pack slightly impacts handling, the air suspension on the rear axle helps to maintain a comfortable ride and stable cornering. The steering is precise and well-weighted, providing a confident feel behind the wheel.
Equipment & Trim Levels
The GLC 400e typically comes standard with a high level of equipment, reflecting its mid-to-premium positioning. Standard features include Mercedes-Benz’s MBUX infotainment system with a large touchscreen display, premium upholstery (often leather), 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. Optional extras include upgraded audio systems, ventilated front seats, a head-up display, and various cosmetic enhancements. Interior trim options typically include wood, aluminum, and carbon fiber accents.
Chassis & Braking
The GLC 400e utilizes an independent multi-link suspension system at both the front and rear axles. The rear suspension incorporates air suspension, which provides adjustable ride height and improved comfort. Ventilated disc brakes are used on all four wheels, providing ample stopping power. The braking system is integrated with the hybrid powertrain to maximize energy recuperation, converting kinetic energy into electricity during deceleration. Standard safety features include ABS, electronic stability control, and traction control. The vehicle’s steering system is a rack-and-pinion type with electric power assistance.
Market Reception & Comparison
The GLC 400e was generally well-received by automotive critics, who praised its blend of performance, efficiency, and luxury. Reviewers noted the impressive all-electric range and the seamless integration of the hybrid powertrain. Compared to other GLC variants, the 400e offers a more compelling driving experience for those seeking greater performance. However, the higher price tag and added weight were noted as potential drawbacks. In terms of fuel economy, the 400e significantly outperforms the gasoline-only GLC 300, particularly in urban driving conditions. Reliability reports have been generally positive, with owners reporting few major issues with the hybrid powertrain.
Legacy
The Mercedes-Benz GLC 400e represents a key step in the brand’s transition towards electrification. The powertrain, while superseded by newer hybrid technologies, remains a capable and reliable unit. On the used car market, the GLC 400e holds its value well, attracting buyers who appreciate its combination of luxury, performance, and fuel efficiency. The vehicle’s advanced technology and sophisticated design continue to make it a desirable option for those seeking a premium plug-in hybrid SUV.
