The Mercedes-Benz C-Class T-modell (S204) C 250 CDI BlueEFFICIENCY 4MATIC, produced from 2010 to 2011, represented a compelling blend of practicality, efficiency, and performance within the C-Class estate range. Positioned as a mid-range offering, it catered to buyers seeking a versatile vehicle with strong fuel economy and all-weather capability. This variant combined a potent turbocharged diesel engine with a sophisticated seven-speed automatic transmission and Mercedes-Benz’s 4MATIC all-wheel-drive system, making it a popular choice in European markets where estate cars are highly valued.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | C-Class |
| Generation | C-Class T-modell (S204) |
| Type | C 250 CDI BlueEFFICIENCY (204 Hp) 4MATIC 7G-TRONIC |
| Start of production | 2010 |
| End of production | 2011 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Station wagon (estate) |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 9.1-9.7 l/100 km (25.8 – 24.2 US mpg) |
| Fuel consumption (extra urban) | 5.2-5.8 l/100 km (45.2 – 40.6 US mpg) |
| Fuel consumption (combined) | 6.6-7.3 l/100 km (35.6 – 32.2 US mpg) |
| CO2 emissions | 173-190 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 7.2 sec |
| Acceleration 0 – 62 mph | 7.2 sec |
| Acceleration 0 – 60 mph | 6.8 sec |
| Maximum speed | 235 km/h (146.02 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 8.1 kg/Hp |
| Weight-to-torque ratio | 3.3 kg/Nm |
| Power | 204 Hp @ 4200 rpm |
| Torque | 500 Nm @ 1600-1800 rpm (368.78 lb.-ft. @ 1600-1800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 651.912 |
| Engine displacement | 2143 cm3 (130.77 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 83 mm (3.27 in.) |
| Piston Stroke | 99 mm (3.9 in.) |
| Compression ratio | 16.2:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | BiTurbo, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Kerb Weight | 1660 kg (3659.67 lbs.) |
| Max. weight | 2275 kg (5015.52 lbs.) |
| Max load | 615 kg (1355.84 lbs.) |
| Trunk (boot) space – minimum | 485 l (17.13 cu. ft.) |
| Trunk (boot) space – maximum | 1500 l (52.97 cu. ft.) |
| Fuel tank capacity | 59 l (15.59 US gal | 12.98 UK gal) |
| Permitted trailer load with brakes (12%) | 1800 kg (3968.32 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Length | 4596 mm (180.94 in.) |
| Width | 1770 mm (69.69 in.) |
| Width including mirrors | 2009 mm (79.09 in.) |
| Height | 1459 mm (57.44 in.) |
| Wheelbase | 2760 mm (108.66 in.) |
| Front track | 1541 mm (60.67 in.) |
| Rear track | 1544 mm (60.79 in.) |
| Front overhang | 765 mm (30.12 in.) |
| Rear overhang | 1071 mm (42.17 in.) |
| Minimum turning circle | 10.84 m (35.56 ft.) |
| Drivetrain Architecture | All wheel drive (4×4) |
| Number of gears | 7 |
| Gearbox type | Automatic transmission G-TRONIC |
| Front suspension | Independent type McPherson, Transverse stabilizer |
| Rear suspension | Independent multi-link suspension, Transverse stabilizer |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 205/55 R16 |
| Wheel rims size | 7J x 16 |
Powertrain & Engine Architecture
The heart of the C 250 CDI BlueEFFICIENCY was the OM 651.912, a 2.1-liter inline-four cylinder diesel engine. This engine was a cornerstone of Mercedes-Benz’s diesel offerings, known for its robust construction and efficiency. It featured common-rail direct injection, delivering fuel at extremely high pressure for optimized combustion. The engine employed a sophisticated bi-turbocharger system – a smaller turbo for quick response at low engine speeds and a larger turbo for increased power at higher RPMs. An intercooler further enhanced performance by cooling the compressed intake air. The DOHC valvetrain with four valves per cylinder contributed to the engine’s breathing efficiency. Paired with the engine was the 7G-TRONIC seven-speed automatic transmission, renowned for its smooth shifts and wide gear ratio spread. This transmission allowed the engine to operate in its most efficient range more often, contributing to the vehicle’s impressive fuel economy.
Driving Characteristics
The C 250 CDI BlueEFFICIENCY 4MATIC offered a refined and capable driving experience. While not a sports car, the 204 horsepower and substantial 368 lb-ft of torque provided ample power for everyday driving and overtaking maneuvers. The 7G-TRONIC transmission was well-tuned, offering seamless gear changes and contributing to a relaxed cruising experience. The 4MATIC all-wheel-drive system provided excellent traction in various weather conditions, enhancing stability and confidence. Compared to the C 350 models with their V6 engines, the C 250 CDI offered a more fuel-efficient and torque-focused driving experience. While lacking the outright acceleration of the V6, the diesel engine’s strong low-end torque made it feel responsive in real-world driving situations. Compared to manual transmission versions, the automatic provided greater convenience, particularly in urban environments.
Equipment & Trim Levels
The C 250 CDI BlueEFFICIENCY 4MATIC typically came standard with a comprehensive list of features, including automatic climate control, a multi-function steering wheel, power windows and mirrors, and a high-quality audio system. Interior upholstery was typically a combination of fabric and Artico leather. Optional extras included a sunroof, navigation system, upgraded audio systems, leather upholstery, and parking sensors. The “BlueEFFICIENCY” designation indicated the inclusion of fuel-saving technologies such as start-stop functionality and optimized aerodynamics.
Chassis & Braking
The S204 C-Class estate featured a McPherson strut front suspension and a multi-link independent rear suspension. This setup provided a good balance between ride comfort and handling. Stabilizer bars were fitted to both axles to reduce body roll during cornering. The C 250 CDI 4MATIC was equipped with ventilated disc brakes at the front and solid disc brakes at the rear. ABS (Anti-lock Braking System) was standard, enhancing braking performance and safety. The all-wheel-drive system distributed power between the front and rear axles as needed, optimizing traction and stability.
Market Reception & Comparison
The C 250 CDI BlueEFFICIENCY 4MATIC was generally well-received by automotive critics. It was praised for its fuel efficiency, strong torque output, and comfortable ride. The all-wheel-drive system was also a significant selling point, particularly in regions with inclement weather. Compared to other trims in the C-Class lineup, the C 250 CDI offered a compelling value proposition, providing a good balance of performance, economy, and practicality. Its fuel economy was significantly better than the gasoline-powered C 350, while its torque output was comparable. However, some critics noted that the diesel engine was slightly noisier than the gasoline engines.
Legacy
The OM 651 engine family, including the 2.1-liter variant found in the C 250 CDI, has proven to be remarkably durable and reliable. These engines are known for their longevity and relatively low maintenance costs. On the used car market, the C 250 CDI BlueEFFICIENCY 4MATIC remains a popular choice, particularly for buyers seeking a practical and fuel-efficient estate car. However, potential buyers should be aware of the potential for diesel particulate filter (DPF) issues, particularly if the vehicle has been primarily used for short trips. Regular maintenance and the use of high-quality diesel fuel are essential for ensuring the long-term reliability of this powertrain.
