Technical Specifications
| Brand | Mercedes-Benz |
| Model | C-class |
| Generation | C-class Coupe (C205, facelift 2018) |
| Type (Engine) | C 300d (245 Hp) 4MATIC 9G-TRONIC |
| Start of production | 2018 |
| End of production | 2023 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption at Low speed (WLTP) | 5.6 l/100 km (42 US mpg, 50.4 UK mpg, 17.9 km/l) |
| Fuel consumption at very high speed (WLTP) | 6.4 l/100 km (36.8 US mpg, 44.1 UK mpg, 15.6 km/l) |
| CO2 emissions (WLTP) | 147-169 g/km |
| Fuel consumption (economy) – urban | 6.2-6.8 l/100 km (37.9 – 34.6 US mpg, 45.6 – 41.5 UK mpg, 16.1 – 14.7 km/l) |
| Fuel consumption (economy) – extra urban | 4.6-5.1 l/100 km (51.1 – 46.1 US mpg, 61.4 – 55.4 UK mpg, 21.7 – 19.6 km/l) |
| Fuel consumption (economy) – combined | 5.2-5.7 l/100 km (45.2 – 41.3 US mpg, 54.3 – 49.6 UK mpg, 19.2 – 17.5 km/l) |
| CO2 emissions | 137 – 150 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 6 sec |
| Acceleration 0 – 62 mph | 6 sec |
| Acceleration 0 – 60 mph | 5.7 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 6.8 kg/Hp, 147.6 Hp/tonne |
| Weight-to-torque ratio | 3.3 kg/Nm, 301.2 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 654.920 |
| 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) |
| Coolant | 10 l (10.57 US qt | 8.8 UK qt) |
| Kerb Weight | 1660 kg (3659.67 lbs.) |
| Max. weight | 2230 kg (4916.31 lbs.) |
| Max load | 570 kg (1256.63 lbs.) |
| Fuel tank capacity | 50 l (13.21 US gal | 11 UK gal) |
| Permitted trailer load with brakes (12%) | 1800 kg (3968.32 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Length | 4686 mm (184.49 in.) |
| Width | 1810 mm (71.26 in.) |
| Height | 1405 mm (55.31 in.) |
| Wheelbase | 2840 mm (111.81 in.) |
| Front track | 1567 mm (61.69 in.) |
| Front overhang | 790 mm (31.1 in.) |
| Rear overhang | 1056 mm (41.57 in.) |
| Ride height (ground clearance) | 88 mm (3.46 in.) |
| Approach angle | 13.2° |
| Departure angle | 14.3° |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 9 gears, automatic transmission G-TRONIC |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
The Mercedes-Benz C-Class Coupe (C205), particularly the facelifted version introduced in 2018, represented a significant step forward in the luxury compact coupe segment. The C 300d 4MATIC, equipped with the 9G-TRONIC automatic transmission, was a key variant produced from 2018 through 2023. This model blended diesel efficiency with respectable performance and the all-weather capability of Mercedes-Benz’s 4MATIC all-wheel-drive system. It occupied a middle ground in the C-Class Coupe lineup, offering a more refined and economical alternative to the higher-performance C 43 and C 63 AMG models, while providing more power and sophistication than the base C 200 variants.
Powertrain & Engine Architecture
The heart of the C 300d is the OM 654.920, a 2.0-liter inline-four cylinder diesel engine. This engine is a highly advanced design, featuring a steel piston block, aluminum cylinder head, and a sophisticated common-rail direct injection system operating at pressures up to 2,700 bar. The engine utilizes a variable geometry turbocharger (VGT) and intercooler to optimize performance and efficiency. The OM 654 engine family is known for its relatively lightweight construction and advanced noise and vibration reduction technologies. The 9G-TRONIC nine-speed automatic transmission is a crucial component, offering smooth and efficient gear changes. This transmission features a wide gear ratio spread, allowing for both relaxed cruising and responsive acceleration. The transmission is electronically controlled and adapts to driving style and conditions.
Driving Characteristics
The C 300d 4MATIC Coupe delivers a refined and comfortable driving experience. The 500 Nm (368 lb-ft) of torque, available from 1600-2400 rpm, provides strong acceleration in everyday driving situations. While not as overtly sporty as the C 43 or C 63, the C 300d offers a respectable 0-60 mph time of around 5.7 seconds. The 9G-TRONIC transmission contributes to smooth progress, and the 4MATIC all-wheel-drive system provides excellent traction in various weather conditions. Compared to the rear-wheel-drive C 300, the 4MATIC version offers enhanced stability and confidence, particularly on slippery surfaces. The gear ratios are tuned for a balance of fuel efficiency and responsiveness, with higher gears prioritizing economy during highway cruising.
Equipment & Trim Levels
The C 300d 4MATIC Coupe came well-equipped as standard. Typical features included leather upholstery, automatic climate control, a high-resolution infotainment system with navigation, and a suite of driver-assistance systems such as adaptive cruise control, lane-keeping assist, and automatic emergency braking. Optional extras included a panoramic sunroof, premium sound system (Burmester), head-up display, and various interior trim options. The interior design emphasized luxury and modernity, with high-quality materials and a driver-focused layout. The standard dashboard configuration featured analog gauges combined with a central digital display screen.
Chassis & Braking
The C 205 Coupe features a four-link front suspension and a multi-link rear suspension, providing a comfortable ride and precise handling. The suspension is tuned to balance comfort and agility, offering a good compromise for both city driving and longer journeys. The 4MATIC all-wheel-drive system utilizes a multi-plate clutch to distribute torque between the front and rear axles as needed. Braking duties are handled by ventilated discs on all four wheels, providing ample stopping power. The electronic stability program (ESP) and anti-lock braking system (ABS) are standard features, enhancing safety and control.
Market Reception & Comparison
The C 300d 4MATIC Coupe was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, and luxurious interior. The fuel economy was a significant selling point, particularly in Europe. Compared to the C 300 gasoline variant, the C 300d offered superior fuel efficiency and torque, making it a more practical choice for long-distance driving. However, some critics noted that the diesel engine lacked the sporty character of the gasoline engines. Against competitors like the Audi A5 Coupe and BMW 4 Series Coupe, the C 300d 4MATIC offered a compelling combination of luxury, performance, and efficiency.
Legacy
The OM 654 engine family has proven to be remarkably reliable, and the C 300d 4MATIC Coupe is generally considered a well-built and durable vehicle. On the used car market, these models hold their value reasonably well, reflecting their reputation for quality and refinement. Regular maintenance, including oil changes and filter replacements, is crucial for ensuring long-term reliability. The 9G-TRONIC transmission has also proven to be robust, although some owners have reported minor issues with software glitches. Overall, the C 300d 4MATIC Coupe represents a sophisticated and capable luxury coupe that continues to appeal to buyers seeking a blend of performance, efficiency, and comfort.
