The Mercedes-Benz C 250d Coupe (C205), produced from 2016 to 2018, represented a compelling blend of luxury, performance, and efficiency within the C-Class Coupe range. Positioned as a mid-range offering, it slotted between the entry-level C 200 and the more potent C 300, appealing to buyers seeking a refined driving experience with strong fuel economy. This variant was primarily marketed in Europe and other regions where diesel engines remained popular, offering a sophisticated alternative to gasoline-powered coupes.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | C-class |
| Generation | C-class Coupe (C205) |
| Type (Engine) | C 250d (204 Hp) 9G-TRONIC |
| Start of production | 2016 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 5.1-4.8 l/100 km (46.1 – 49 US mpg, 55.4 – 58.9 UK mpg, 19.6 – 20.8 km/l) |
| Fuel consumption (extra urban) | 4.1-3.8 l/100 km (57.4 – 61.9 US mpg, 68.9 – 74.3 UK mpg, 24.4 – 26.3 km/l) |
| Fuel consumption (combined) | 4.4-4.2 l/100 km (53.5 – 56 US mpg, 64.2 – 67.3 UK mpg, 22.7 – 23.8 km/l) |
| CO2 emissions | 116-109 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 6.7 sec |
| Acceleration 0 – 62 mph | 6.7 sec |
| Acceleration 0 – 60 mph | 6.4 sec |
| Maximum speed | 247 km/h (153.48 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 7.7 kg/Hp, 129.9 Hp/tonne |
| Weight-to-torque ratio | 3.1 kg/Nm, 318.5 Nm/tonne |
| Power | 204 Hp @ 3800 rpm |
| Power per litre | 95.2 Hp/l |
| Torque | 500 Nm @ 1600-1800 rpm (368.78 lb.-ft. @ 1600-1800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 651.921 |
| Engine displacement | 2143 cm3 (130.77 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Compression ratio | 16.2:1 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | BiTurbo, Intercooler |
| Engine oil capacity | 6 l (6.34 US qt | 5.28 UK qt) |
| Kerb Weight | 1570 kg (3461.26 lbs.) |
| Max. weight | 2125 kg (4684.82 lbs.) |
| Max load | 555 kg (1223.57 lbs.) |
| Trunk (boot) space – minimum | 400 l (14.13 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%) | 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.) |
| Width including mirrors | 2016 mm (79.37 in.) |
| Height | 1405 mm (55.31 in.) |
| Wheelbase | 2840 mm (111.81 in.) |
| Front track | 1563 mm (61.54 in.) |
| Rear (Back) track | 1546 mm (60.87 in.) |
| Ride height (ground clearance) | 89 mm (3.5 in.) |
| Minimum turning circle (turning diameter) | 11.22 m (36.81 ft.) |
| Approach angle | 13.1° |
| Departure angle | 14.5° |
| Drivetrain Architecture | Rear wheel drive |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 9 gears, automatic transmission G-TRONIC |
| Front suspension | Independent multi-link suspension |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Tires size | 225/50 R17 |
| Wheel rims size | 17 |
INTRODUCTION
The C205 C-Class Coupe, launched in 2015, represented a significant departure from its predecessor, adopting a more sophisticated and sporty design language. The C 250d, introduced in 2016, quickly became a popular choice, particularly in Europe, where diesel engines were favored for their fuel efficiency and torque. Built on the W205 C-Class sedan platform, the C205 Coupe offered a more dynamic driving experience with its two-door configuration and lower center of gravity. The C 250d specifically targeted buyers who desired a premium coupe experience without sacrificing practicality or running costs.
Powertrain & Engine Architecture
At the heart of the C 250d lies the OM 651.921, a 2.1-liter inline-four diesel engine. This engine is a highly refined unit, featuring a common-rail direct injection system and a sophisticated bi-turbocharger setup. The twin turbos, one larger and one smaller, work in sequence to provide both strong low-end torque and high-end power. The engine produces 204 horsepower at 3800 rpm and a substantial 500 Nm (368 lb-ft) of torque between 1600 and 1800 rpm. This torque output is a key characteristic of the engine, providing effortless acceleration and strong in-gear performance. The engine also incorporates an intercooler to further enhance efficiency and power. Paired with the engine is the 9G-TRONIC nine-speed automatic transmission. This transmission is known for its smooth shifts and wide gear ratio spread, contributing to both fuel efficiency and responsive acceleration. The 9G-TRONIC allows the engine to operate within its optimal efficiency range more frequently, maximizing fuel economy.
Driving Characteristics
The C 250d Coupe delivers a refined and comfortable driving experience. The abundant torque from the diesel engine provides strong acceleration from low speeds, making it well-suited for everyday driving and overtaking maneuvers. While not as overtly sporty as the C 300, the C 250d offers a respectable 0-60 mph time of around 6.4 seconds. The 9G-TRONIC transmission contributes to smooth and seamless gear changes, enhancing the overall driving experience. The gear ratios are well-chosen, providing both quick acceleration and relaxed cruising at highway speeds. Compared to the manual transmission options available on other C-Class models, the 9G-TRONIC prioritizes comfort and efficiency over outright driver engagement. The suspension setup, while firm enough to provide good body control, is tuned for comfort, absorbing bumps and imperfections in the road surface effectively.
Equipment & Trim Levels
The C 250d Coupe came standard with a generous array of features, reflecting its position as a mid-range offering. Standard equipment typically included automatic climate control, a high-resolution infotainment system with a central display screen, leather upholstery, and a suite of safety features such as ABS, ESP, and multiple airbags. Optional extras included features such as a panoramic sunroof, premium sound system, advanced driver assistance systems (like lane keeping assist and adaptive cruise control), and various interior trim options. The interior design was characterized by its high-quality materials and elegant styling, creating a luxurious and inviting cabin environment.
Chassis & Braking
The C205 C-Class Coupe features an independent multi-link suspension system at both the front and rear axles. This suspension design provides excellent ride comfort and handling characteristics. The front suspension utilizes coil springs and dampers, while the rear suspension incorporates a more complex multi-link setup to optimize wheel control and stability. The C 250d Coupe is equipped with ventilated disc brakes at the front and solid disc brakes at the rear. The braking system provides ample stopping power and features ABS (Anti-lock Braking System) to prevent wheel lockup during emergency braking. The steering system is a rack-and-pinion setup, providing precise and responsive steering feel.
Market Reception & Comparison
The C 250d Coupe was generally well-received by automotive critics. It was praised for its fuel efficiency, strong torque output, and comfortable ride. However, some critics noted that the diesel engine could be somewhat noisy compared to gasoline alternatives. Compared to the C 200, the C 250d offered significantly more performance and a more refined driving experience. In contrast to the C 300, the C 250d prioritized fuel economy and torque over outright horsepower. The C 250d’s fuel economy figures were consistently impressive, making it an attractive option for drivers who covered long distances. Reliability reports generally indicated that the OM 651 engine was a durable and dependable unit, although regular maintenance was essential to ensure long-term reliability.
Legacy
The Mercedes-Benz C 250d Coupe (C205) remains a popular choice in the used car market. Its combination of luxury, performance, and fuel efficiency continues to appeal to buyers. The OM 651 diesel engine is known for its longevity, provided it has been properly maintained. However, potential buyers should be aware of the potential for diesel particulate filter (DPF) issues, particularly if the vehicle has primarily been used for short journeys. Overall, the C 250d Coupe represents a well-engineered and refined coupe that offers a compelling blend of practicality and prestige.
