The Mercedes-Benz GLC 300de 4MATIC, a plug-in hybrid variant of the C253 GLC Coupe (following the facelift in 2019), represents a significant step in the brand’s commitment to electrification. Production spanned from May 2020 to July 2023, positioning it within the broader GLC model range as a fuel-efficient and technologically advanced option. This model combined a diesel engine with an electric motor, offering both all-electric driving capability and the extended range of a conventional powertrain. It was primarily marketed in Europe and other regions with strong incentives for plug-in hybrid vehicles.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | GLC |
| Generation | GLC Coupe (C253, facelift 2019) |
| Type | GLC 300de (306 Hp) Plug-in Hybrid 4MATIC 9G-TRONIC |
| Start of production | May, 2020 |
| End of production | July, 2023 |
| Powertrain Architecture | PHEV (Plug-in Hybrid Electric Vehicle) |
| Body type | Coupe, SUV |
| Seats | 5 |
| Doors | 5 |
| Combined fuel consumption (WLTP) | 1.7 l/100 km (138.4 US mpg, 166.2 UK mpg, 58.8 km/l) |
| CO2 emissions (WLTP) | 45 g/km |
| Fuel consumption (NEDC) – combined | 1.8-2.1 l/100 km (130.7 – 112 US mpg, 156.9 – 134.5 UK mpg, 55.6 – 47.6 km/l) |
| CO2 emissions (NEDC) | 45-54 g/km |
| Fuel Type | Diesel / electricity |
| Acceleration 0 – 100 km/h | 6.2 sec |
| Acceleration 0 – 62 mph | 6.2 sec |
| Acceleration 0 – 60 mph | 5.9 sec |
| Maximum speed | 230 km/h (142.92 mph) |
| Emission standard | Euro 6d-ISC-FCM |
| Weight-to-power ratio | 6.7 kg/Hp, 148.5 Hp/tonne |
| Weight-to-torque ratio | 2.9 kg/Nm, 339.8 Nm/tonne |
| Gross battery capacity | 13.5 kWh |
| Net (usable) battery capacity | 9.3 kWh |
| Battery technology | Lithium-ion (Li-Ion) |
| Battery location | Under the trunk |
| All-electric range (WLTP) | 41-45 km (25.48 – 27.96 mi) |
| All-electric range (NEDC) | 45-51 km (27.96 – 31.69 mi) |
| Average Energy consumption (WLTP) | 18.1 kWh/100 km (29.13 kWh/100 mi, 116 MPGe, 5.5 km/kWh, 3.4 mi/kWh) |
| Average Energy consumption (NEDC) | 14.5-17.4 kWh/100 km (23.34 – 28 kWh/100 mi, 144 – 120 MPGe, 6.9 – 5.7 km/kWh, 4.3 – 3.6 mi/kWh) |
| Max speed (electric) | 130 km/h (80.78 mph) |
| Electric motor power | 122 Hp |
| Electric motor Torque | 440 Nm (324.53 lb.-ft.) |
| Electric motor location | Between the combustion engine and the transmission |
| System power | 306 Hp |
| System torque | 700 Nm (516.29 lb.-ft.) |
| Power | 194 Hp |
| Torque | 400 Nm (295.02 lb.-ft.) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 654.920 |
| Engine displacement | 1950 cm3 (119 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 82 mm (3.23 in.) |
| Piston Stroke | 92.3 mm (3.63 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 | 6 l (6.34 US qt | 5.28 UK qt) |
| Coolant | 12.5 l (13.21 US qt | 11 UK qt) |
| Kerb Weight | 2060 kg (4541.52 lbs.) |
| Max. weight | 2660 kg (5864.3 lbs.) |
| Max load | 600 kg (1322.77 lbs.) |
| Trunk (boot) space – minimum | 350 l (12.36 cu. ft.) |
| Trunk (boot) space – maximum | 1250 l (44.14 cu. ft.) |
| Fuel tank capacity | 50 l (13.21 US gal | 11 UK gal) |
| Max. roof load | 75 kg (165.35 lbs.) |
| Permitted trailer load with brakes (12%) | 2000 kg (4409.25 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 80 kg (176.37 lbs.) |
| Length | 4731 mm (186.26 in.) |
| Width | 1890 mm (74.41 in.) |
| Width including mirrors | 2096 mm (82.52 in.) |
| Height | 1600 mm (62.99 in.) |
| Wheelbase | 2873 mm (113.11 in.) |
| Front track | 1621 mm (63.82 in.) |
| Rear (Back) track | 1617 mm (63.66 in.) |
| Front overhang | 830 mm (32.68 in.) |
| Rear overhang | 1028 mm (40.47 in.) |
| Drag coefficient (Cd) | 0.32 |
| Minimum turning circle (turning diameter) | 11.8 m (38.71 ft.) |
| Front suspension | Coil spring, Double wishbone, Transverse stabilizer |
| Rear suspension | Independent multi-link suspension, Transverse stabilizer, Coil spring |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Number of gears and type of gearbox | 9 gears, automatic transmission G-TRONIC |
INTRODUCTION
The Mercedes-Benz GLC 300de 4MATIC, launched in 2020, is a plug-in hybrid (PHEV) variant of the popular GLC Coupe (C253 series, post-facelift). It builds upon the foundation of the standard GLC, offering a compelling blend of luxury, performance, and efficiency. The “de” designation signifies its diesel-electric powertrain. This model was designed to appeal to buyers seeking reduced emissions and the benefits of electric driving for shorter commutes, while retaining the long-distance capability of a conventional vehicle. It sat in a mid-to-premium position within the GLC lineup, offering more performance and technology than the base models but falling short of the full AMG variants.
Powertrain & Engine Architecture
The GLC 300de utilizes a sophisticated powertrain combining a 2.0-liter inline-four cylinder diesel engine (OM 654.920) with a powerful electric motor. The diesel engine produces 194 horsepower and 400 Nm (295 lb-ft) of torque. The electric motor contributes an additional 122 horsepower and 440 Nm (324 lb-ft) of torque. Combined, the system delivers a total output of 306 horsepower and 700 Nm (516 lb-ft) of torque. The engine features a turbocharger with intercooling and a common rail direct fuel injection system. The electric motor is integrated between the engine and the 9G-TRONIC nine-speed automatic transmission, allowing for seamless transitions between electric, diesel, and combined power modes. The 13.5 kWh lithium-ion battery pack is located under the trunk floor, providing a usable capacity of 9.3 kWh. This battery can be charged via a standard household outlet or a dedicated charging station.
Driving Characteristics
The GLC 300de offers a refined and versatile driving experience. In electric mode, it provides near-silent operation and instant torque, making it ideal for urban driving. The all-electric range, rated at 41-45 km (25-28 miles) WLTP, is sufficient for many daily commutes. When the battery is depleted or when more power is required, the diesel engine seamlessly kicks in, providing ample acceleration and cruising ability. The 9G-TRONIC transmission offers smooth and precise gear changes, contributing to a comfortable ride. While not as overtly sporty as some of its rivals, the GLC 300de delivers a composed and confident handling experience. The combined power output allows for a 0-60 mph time of around 5.9 seconds, making it a relatively quick vehicle for its class. The weight of the battery pack does add some weight, but the electric motor’s torque helps to offset this.
Equipment & Trim Levels
The GLC 300de 4MATIC typically came well-equipped as standard. Features included Mercedes-Benz’s MBUX infotainment system with a touchscreen display, navigation, Apple CarPlay and Android Auto compatibility, and a premium sound system. Interior upholstery was typically Artico leather (a high-quality synthetic leather), with options for genuine leather upgrades. Standard safety features included automatic emergency braking, lane keeping assist, and adaptive cruise control. Optional extras included a panoramic sunroof, heated and ventilated seats, a head-up display, and advanced driver assistance systems. The trim level often included unique exterior styling elements, such as AMG body styling and specific wheel designs.
Chassis & Braking
The GLC 300de utilizes a sophisticated chassis setup designed to balance comfort and handling. The front suspension features coil springs and a double wishbone design, while the rear suspension employs an independent multi-link setup. Both ends are equipped with transverse stabilizers to reduce body roll. The braking system consists of ventilated discs on all four wheels, providing ample stopping power. ABS (Anti-lock Braking System) and electronic stability control are standard features. The suspension tuning is generally geared towards comfort, but it still provides a secure and planted feel in corners. The weight distribution is carefully managed to optimize handling characteristics.
Market Reception & Comparison
The GLC 300de was generally well-received by automotive critics. It was praised for its fuel efficiency, smooth powertrain, and comfortable ride. The ability to drive in all-electric mode was a significant selling point for many buyers. Compared to the GLC 200d and GLC 300 petrol variants, the 300de offered superior fuel economy and lower emissions, albeit at a higher price point. Compared to other plug-in hybrid SUVs in its class, such as the BMW X3 xDrive30e and the Volvo XC60 Recharge, the GLC 300de offered a competitive combination of performance, luxury, and efficiency. Some critics noted that the battery pack reduced trunk space compared to the non-hybrid models.
Legacy
The Mercedes-Benz GLC 300de 4MATIC represents an important step in Mercedes-Benz’s transition towards electrification. The OM 654 diesel engine, combined with the electric motor and 9G-TRONIC transmission, proved to be a reliable and efficient powertrain. On the used car market, these models are generally sought after for their fuel economy and low running costs. The longevity of the battery pack is a key consideration for potential buyers, but Mercedes-Benz offers extended warranties on the battery to provide peace of mind. The GLC 300de remains a compelling option for buyers seeking a luxurious and environmentally conscious SUV.
