The Mercedes-Benz GLC 300d 4MATIC Coupe (C253, post-facelift) represents a compelling blend of luxury, performance, and practicality within the mid-size SUV segment. Introduced in May 2019 and continuing through July 2023, this variant occupied a significant position in the GLC Coupe lineup, offering a diesel-powered alternative to the gasoline-fueled models. The facelift brought styling updates and technological enhancements to the C253 platform, which is based on the W205 C-Class architecture. This model aimed to appeal to buyers seeking a more efficient and torque-rich engine without sacrificing the coupe-like aesthetics and premium features associated with the Mercedes-Benz brand.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | GLC |
| Generation | GLC Coupe (C253, facelift 2019) |
| Type (Engine) | GLC 300d (245 Hp) 4MATIC G-TRONIC |
| Start of production | May, 2019 |
| End of production | July, 2023 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe, SUV |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption at Low speed (WLTP) | 6.4 l/100 km (36.8 US mpg, 44.1 UK mpg, 15.6 km/l) |
| Fuel consumption at very high speed (WLTP) | 7.1 l/100 km (33.1 US mpg, 39.8 UK mpg, 14.1 km/l) |
| CO2 emissions (WLTP) | 167-187 g/km |
| Fuel consumption (economy) – urban | 6.8-7.4 l/100 km (34.6 – 31.8 US mpg, 41.5 – 38.2 UK mpg, 14.7 – 13.5 km/l) |
| Fuel consumption (economy) – extra urban | 5.0-5.4 l/100 km (47 – 43.6 US mpg, 56.5 – 52.3 UK mpg, 20 – 18.5 km/l) |
| Fuel consumption (economy) – combined | 5.8-6.0 l/100 km (40.6 – 39.2 US mpg, 48.7 – 47.1 UK mpg, 17.2 – 16.7 km/l) |
| CO2 emissions | 152-159 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 6.6 sec |
| Acceleration 0 – 62 mph | 6.6 sec |
| Acceleration 0 – 60 mph | 6.3 sec |
| Maximum speed | 233 km/h (144.78 mph) |
| Emission standard | Euro 6d ISC |
| Weight-to-power ratio | 7.3 kg/Hp, 136.1 Hp/tonne |
| Weight-to-torque ratio | 3.6 kg/Nm, 277.8 Nm/tonne |
| Power | 245 Hp |
| Power per litre | 125.6 Hp/l |
| Torque | 500 Nm @ 1600-2400 rpm (368.78 lb.-ft. @ 1600-2400 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 654 DE 20 SCR |
| Engine displacement | 1950 cm3 (119 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Engine oil capacity | 6.8 l (7.19 US qt | 5.98 UK qt) |
| Kerb Weight | 1800 kg (3968.32 lbs.) |
| Max. weight | 2530 kg (5577.7 lbs.) |
| Max load | 730 kg (1609.37 lbs.) |
| Trunk (boot) space – minimum | 500 l (17.66 cu. ft.) |
| Trunk (boot) space – maximum | 1400 l (49.44 cu. ft.) |
| Fuel tank capacity | 50 l (13.21 US gal | 11 UK gal) |
| Permitted trailer load with brakes (12%) | 2500 kg (5511.56 lbs.) |
| Length | 4731 mm (186.26 in.) |
| Width | 1890 mm (74.41 in.) |
| Height | 1600 mm (62.99 in.) |
| Wheelbase | 2873 mm (113.11 in.) |
| Front track | 1621 mm (63.82 in.) |
| Front overhang | 830 mm (32.68 in.) |
| Rear overhang | 1028 mm (40.47 in.) |
| Ride height (ground clearance) | 128 mm (5.04 in.) |
| Approach angle | 20.2° |
| Departure angle | 14.8° |
| Ramp-over (brakeover) angle | 11.2° |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 9 gears, automatic transmission G-TRONIC |
| Tires size | 235/60 R18 |
| Wheel rims size | 8J x 18 |
Powertrain & Engine Architecture
The GLC 300d Coupe is powered by the OM 654 DE 20 SCR, a 2.0-liter inline-four cylinder diesel engine. This engine is a cornerstone of Mercedes-Benz’s modern diesel strategy, known for its efficiency and refinement. It utilizes a two-stage turbocharging system, combining a small, variable geometry turbocharger for quick response with a larger turbocharger for increased power at higher engine speeds. The engine employs a commonrail direct injection system, delivering fuel at pressures up to 2,700 bar for optimized combustion. A Selective Catalytic Reduction (SCR) system, utilizing AdBlue, is integrated to significantly reduce nitrogen oxide (NOx) emissions, ensuring compliance with stringent Euro 6d ISC emission standards. The 9G-TRONIC nine-speed automatic transmission is standard, offering smooth and efficient gear changes. This transmission is designed to optimize fuel economy and provide a comfortable driving experience.
Driving Characteristics
The 245 horsepower and 368 lb-ft of torque produced by the OM 654 engine provide the GLC 300d Coupe with brisk acceleration. The 0-60 mph sprint takes approximately 6.3 seconds, making it a competitive performer in its class. The 9G-TRONIC transmission is well-tuned for this engine, providing seamless shifts and keeping the engine within its optimal torque band. Compared to the gasoline-powered GLC 300, the 300d offers superior low-end torque, resulting in effortless overtaking and a more relaxed driving experience, particularly when fully loaded or towing. While not as outright sporty as some of its rivals, the GLC 300d Coupe delivers a refined and capable driving experience, prioritizing comfort and efficiency.
Equipment & Trim Levels
The GLC 300d 4MATIC Coupe typically came well-equipped as standard. Features included Mercedes-Benz’s MBUX infotainment system with a touchscreen display, Apple CarPlay and Android Auto integration, leather upholstery, heated front seats, and a power liftgate. Optional extras included a panoramic sunroof, premium Burmester sound system, advanced driver-assistance systems (such as adaptive cruise control and lane-keeping assist), and various interior trim options. The trim level often influenced the availability of certain features, with higher trims offering more luxurious appointments and advanced technology.
Chassis & Braking
The GLC Coupe utilizes a sophisticated suspension system designed to balance comfort and handling. The front suspension features independent multi-link setup, while the rear employs a four-link independent suspension. The 4MATIC all-wheel-drive system provides excellent traction in all weather conditions. Braking duties are handled by ventilated disc brakes on all four wheels, providing ample stopping power. The suspension tuning is generally geared towards comfort, but the GLC Coupe still offers a reasonably engaging driving experience, with minimal body roll in corners.
Market Reception & Comparison
The GLC 300d Coupe was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, and luxurious interior. The diesel engine’s fuel economy was a significant selling point, particularly in Europe where diesel fuel is more prevalent and often less expensive than gasoline. Compared to the GLC 300 gasoline variant, the 300d offered better fuel economy and more torque, but slightly less outright horsepower. Against competitors like the BMW X4 and Audi Q5 Sportback, the GLC 300d Coupe held its own, offering a compelling combination of luxury, performance, and efficiency.
Legacy
The OM 654 engine has proven to be a reliable and durable powerplant. While diesel engines, in general, have faced increased scrutiny regarding emissions, the OM 654, with its advanced SCR system, has managed to meet stringent emission standards. In the used car market, the GLC 300d Coupe remains a desirable option for buyers seeking a luxurious and efficient SUV. Properly maintained examples continue to offer a comfortable and capable driving experience, and the engine’s longevity suggests that these vehicles can provide many years of reliable service.
