Mercedes GLC 300 de Coupé: Bridging Two Worlds

Mercedes has merged diesel power with plug-in hybrid technology in the GLC 300 de Coupé. The result is a dynamic combination delivering 245 kW (333 PS) and a robust 750 Nm of torque.

Mercedes recently celebrated a decade of plug-in hybrid models, marking a significant chapter in the brand’s move toward electrification. Once seen as a transitional technology, plug-in hybrids are now integral to the electric future, boasting significant all-electric ranges.

The GLC 300 de Coupé exemplifies this progress with a 25.28 kWh battery, offering an impressive WLTP-rated range of 112–123 kilometers on electric power alone.

Diesel Meets Hybrid Efficiency

The GLC 300 de takes an unconventional route by combining a diesel engine with an electric motor. This pairing features a 145 kW (197 PS) diesel engine supported by a 115 kW (156 PS) electric motor. Together, they produce a system output of 245 kW (333 PS) and a hefty 750 Nm of torque. This setup provides smooth performance, taking the SUV from 0 to 100 km/h in 6.4 seconds and topping out at 219 km/h. Impressively, Mercedes claims a fuel consumption of just 0.5 liters per 100 km under WLTP conditions.

In real-world testing, including significant highway driving, the GLC 300 de averaged 5.5 l/100 km of diesel and 4.9 kWh/100 km of electricity—a commendable result for a 2.4-tonne SUV.

Comfort, Agility and Performance

The GLC 300 de Coupé’s suspension combines front coil springs with rear air springs, delivering a balance of comfort and agility. On highways and rough rural roads, the SUV maintains composure, with a stable chassis and a ride that absorbs uneven surfaces. The addition of optional rear-axle steering (€3,320.10) further enhances its maneuverability, allowing the GLC to handle tight corners with surprising agility.

While the hybrid powertrain is smooth and efficient during everyday driving, it lacks the punch expected when calling upon its full potential. Despite a combined 750 Nm of torque, acceleration feels moderate under hard driving. However, the GLC 300 de excels in versatility, even featuring off-road capabilities such as a “transparent” hood display and downhill speed regulation. In fully electric mode, the SUV requires a gentle touch on the accelerator to control its immediate torque delivery—a challenge for off-road enthusiasts who may prefer using the diesel engine for steadier performance.

The towing capacity is also noteworthy, with the GLC 300 de capable of towing up to two tonnes (braked) or 750 kilograms (unbraked).

Technology and Interior Features

Inside, the GLC Coupé boasts a modern tech suite, including a 12.3-inch digital instrument cluster and an 11.9-inch touchscreen tilted slightly toward the driver. Mercedes’ MBUX interface provides extensive functionality, but the menu system can take some getting used to. For those seeking familiarity, both Apple CarPlay and Android Auto are supported.

Driver assistance features, such as the Highway Assist for traffic jams and a 360-degree camera, add convenience, while lane-keeping aids and blind-spot monitoring enhance safety.

Space: A Mixed Bag

While the front passengers enjoy ample comfort, those in the rear may find headroom limited by the sloping roofline, particularly for individuals taller than 1.85 meters. Despite the vehicle’s generous 2.89-meter wheelbase, rear legroom is less accommodating than expected.

The battery’s placement reduces the trunk space to 390 liters—150 liters less than the non-hybrid GLC models. Folding down the rear seats increases cargo capacity to 1,335 liters, which, while practical, still falls short of class-leading figures.

Final Thoughts

The Mercedes GLC 300 de Coupé offers a compelling blend of diesel and hybrid efficiency, enhanced by a well-tuned suspension and cutting-edge technology. While it doesn’t deliver jaw-dropping acceleration, it excels in versatility, comfort, and real-world practicality.

Priced from €77,469, the GLC 300 de Coupé offers a premium option for those seeking a balance between performance and efficiency, even if compromises in space and outright dynamics are part of the package.