The Mercedes-Benz C 300d 4MATIC, produced from 2018 to 2021 as part of the W205 facelift generation of the C-Class, represented a significant offering in the premium compact executive car segment. This variant combined a potent diesel engine with all-wheel drive and a sophisticated nine-speed automatic transmission, aiming to deliver a blend of performance, efficiency, and all-weather capability. Positioned as a mid-to-upper trim level within the C-Class range, the C 300d 4MATIC catered to buyers seeking a refined driving experience without sacrificing practicality or fuel economy. It served as a key competitor to models like the BMW 330d xDrive and Audi A4 2.0 TDI quattro.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | C-class |
| Generation | C-class (W205, facelift 2018) |
| Type | C 300d (245 Hp) 4MATIC 9G-TRONIC |
| Start of production | 2018 |
| End of production | 2021 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| 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) | 6.5 l/100 km (36.2 US mpg, 43.5 UK mpg, 15.4 km/l) |
| CO2 emissions (WLTP) | 148-171 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 | 4.7-5.1 l/100 km (50 – 46.1 US mpg, 60.1 – 55.4 UK mpg, 21.3 – 19.6 km/l) |
| Fuel consumption (economy) – combined | 5.3-5.7 l/100 km (44.4 – 41.3 US mpg, 53.3 – 49.6 UK mpg, 18.9 – 17.5 km/l) |
| CO2 emissions | 139-151 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 5.7 sec |
| Acceleration 0 – 62 mph | 5.7 sec |
| Acceleration 0 – 60 mph | 5.4 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 6.7 kg/Hp, 150.3 Hp/tonne |
| Weight-to-torque ratio | 3.3 kg/Nm, 306.7 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 | 1630 kg (3593.53 lbs.) |
| Max. weight | 2285 kg (5037.56 lbs.) |
| Max load | 655 kg (1444.03 lbs.) |
| Fuel tank capacity | 41 l (10.83 US gal | 9.02 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 | 1442 mm (56.77 in.) |
| Wheelbase | 2840 mm (111.81 in.) |
| Front track | 1588 mm (62.52 in.) |
| Front overhang | 790 mm (31.1 in.) |
| Rear overhang | 1056 mm (41.57 in.) |
| Ride height (ground clearance) | 92 mm (3.62 in.) |
| Approach angle | 13.6° |
| Departure angle | 14.2° |
| 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 |
Powertrain & Engine Architecture
The heart of the C 300d 4MATIC is the OM 654.920, a 2.0-liter inline-four cylinder diesel engine. This engine is a member of Mercedes-Benz’s modular engine family, known for its lightweight construction and advanced technology. It features a steel crankshaft, aluminum engine block, and variable valve timing (VVT) on both intake and exhaust sides. The engine utilizes a two-stage turbocharging system with a variable geometry turbine (VGT) to optimize boost pressure across the rev range, contributing to its strong torque output of 500 Nm (368.78 lb.-ft.) available from 1600-2400 rpm. Fuel is delivered via a common-rail direct injection system operating at extremely high pressures, ensuring efficient combustion and reduced emissions. The 9G-TRONIC nine-speed automatic transmission is a key component, offering smooth and rapid gear changes. It’s designed to maximize fuel efficiency and provide a comfortable driving experience.
Driving Characteristics
The C 300d 4MATIC delivers a refined and capable driving experience. The 245 horsepower and substantial torque provide brisk acceleration, with a 0-60 mph time of around 5.4 seconds. The 9G-TRONIC transmission is well-tuned, offering seamless shifts and keeping the engine in its optimal power band. The 4MATIC all-wheel-drive system provides excellent traction in various conditions, enhancing stability and confidence. Compared to the C 300 gasoline variant, the C 300d offers superior fuel economy and a more relaxed cruising experience due to the diesel engine’s torque characteristics. While not as sporty as the AMG-tuned C 43 or C 63 models, the C 300d provides a balanced blend of performance and efficiency suitable for everyday driving and long-distance journeys.
Equipment & Trim Levels
The C 300d 4MATIC typically came well-equipped as standard. Common features included Mercedes-Benz’s MBUX infotainment system with a touchscreen display, Apple CarPlay and Android Auto integration, leather upholstery, automatic climate control, and a suite of driver-assistance systems such as adaptive cruise control, lane-keeping assist, and automatic emergency braking. Optional extras included a premium sound system, panoramic sunroof, head-up display, and various interior trim upgrades. The interior design was characterized by high-quality materials and a modern, minimalist aesthetic.
Chassis & Braking
The W205 C-Class featured a multi-link independent suspension at all four corners, providing a comfortable ride and precise handling. The C 300d 4MATIC typically utilized slightly stiffer spring rates and dampers compared to lower-powered variants to manage the increased weight and power. Braking duties were handled by ventilated disc brakes on all wheels, providing ample stopping power. The electronic stability program (ESP) and anti-lock braking system (ABS) were standard features, enhancing safety and control.
Market Reception & Comparison
The C 300d 4MATIC was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, and advanced technology. Fuel economy was a significant selling point, with the diesel engine offering substantial savings compared to gasoline alternatives. Compared to its rivals, the C 300d 4MATIC offered a compelling combination of luxury, performance, and efficiency. Some critics noted that the ride could be slightly firm on certain road surfaces, and the infotainment system had a learning curve. However, overall, the C 300d 4MATIC was considered a strong contender in the premium compact executive car segment.
Legacy
The OM 654 engine family has proven to be remarkably reliable, and the C 300d 4MATIC is generally considered a durable and dependable vehicle. Properly maintained examples continue to hold their value in the used car market. The 9G-TRONIC transmission has also demonstrated good long-term reliability. While diesel engines have faced increased scrutiny in recent years, the C 300d 4MATIC remains a popular choice for buyers seeking a fuel-efficient and refined luxury car. Its blend of performance, comfort, and technology ensures its continued relevance in the used car market for years to come.
