The Mercedes-Benz C-Class T-modell (S204), specifically the C 250 CDI BlueEFFICIENCY variant produced from 2011 to 2014, represents a compelling blend of practicality, efficiency, and performance within the premium compact estate (wagon) segment. This facelifted version of the S204 generation, introduced in 2011, benefited from styling revisions, updated technology, and refined engine options. The C 250 CDI BlueEFFICIENCY occupied a mid-range position in the T-modell lineup, offering a balance between the more affordable base models and the higher-performance AMG variants. It was primarily marketed towards European buyers seeking a versatile vehicle capable of both family duties and long-distance travel, with a focus on fuel economy and reduced emissions.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | C-Class |
| Generation | C-Class T-modell (S204, facelift 2011) |
| Type (Engine) | C 250 CDI BlueEFFICIENCY (204 Hp) |
| Start of production | 2011 |
| End of production | 2014 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Station wagon (estate) |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 6.3-6.7 l/100 km (37.3 – 35.1 US mpg, 44.8 – 42.2 UK mpg, 15.9 – 14.9 km/l) |
| Fuel consumption (extra urban) | 4.1-4.6 l/100 km (57.4 – 51.1 US mpg, 68.9 – 61.4 UK mpg, 24.4 – 21.7 km/l) |
| Fuel consumption (combined) | 4.9-5.4 l/100 km (48 – 43.6 US mpg, 57.6 – 52.3 UK mpg, 20.4 – 18.5 km/l) |
| CO2 emissions | 128-141 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 7.3 sec |
| Acceleration 0 – 62 mph | 7.3 sec |
| Acceleration 0 – 60 mph | 6.9 sec |
| Maximum speed | 238 km/h (147.89 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 7.8 kg/Hp, 127.5 Hp/tonne |
| Weight-to-torque ratio | 3.2 kg/Nm, 312.5 Nm/tonne |
| 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 651.911 |
| 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 | Twin-Turbo, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Kerb Weight | 1600 kg (3527.4 lbs.) |
| Max. weight | 2215 kg (4883.24 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) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (12%) | 1800 kg (3968.32 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Length | 4606 mm (181.34 in.) |
| Width | 1770 mm (69.69 in.) |
| Width including mirrors | 2008 mm (79.06 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 | 775 mm (30.51 in.) |
| Rear overhang | 1071 mm (42.17 in.) |
| Drag coefficient (Cd) | 0.29 |
| Minimum turning circle | 10.84 m (35.56 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears | 6 |
| Gearbox type | Manual transmission |
| Front suspension | Independent type McPherson, Transverse stabilizer |
| Rear suspension | Independent multi-link suspension, Transverse stabilizer |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 205/55 R16; 225/45 R17 |
| Wheel rims size | 7J x 16; 7.5J x 17 |
Powertrain & Engine Architecture
The C 250 CDI BlueEFFICIENCY is powered by the OM 651.911, a 2.1-liter inline-four cylinder diesel engine. This engine is a cornerstone of Mercedes-Benz’s diesel offerings, known for its robust construction and efficiency. The ‘BlueEFFICIENCY’ designation signifies the inclusion of technologies aimed at reducing emissions and improving fuel economy, such as a particulate filter and optimized engine management. The OM 651.911 utilizes a second-generation common rail direct injection system, delivering fuel at extremely high pressures (1600 bar) for improved combustion and reduced noise. A twin-turbocharger setup, incorporating a variable geometry turbine (VGT), provides a broad torque curve and responsive performance. The engine features a double overhead camshaft (DOHC) valvetrain with four valves per cylinder. The 6-speed manual transmission was standard, offering precise shifts and contributing to the vehicle’s overall efficiency.
Driving Characteristics
The C 250 CDI T-modell, with its 204 horsepower and 368 lb-ft of torque, delivered a respectable level of performance. Acceleration from 0 to 60 mph took approximately 6.9 seconds, making it adequately quick for everyday driving and overtaking maneuvers. The engine’s peak torque, available from a low 1600-1800 rpm, provided strong pulling power in most situations. Compared to the more powerful C 300 or the performance-oriented AMG models, the C 250 CDI prioritized fuel efficiency and relaxed cruising. The manual transmission, while engaging, required more driver involvement than the optional 7G-TRONIC automatic. The rear-wheel-drive configuration offered a balanced driving experience, though it could be less forgiving in slippery conditions compared to all-wheel-drive variants.
Equipment & Trim Levels
The C 250 CDI BlueEFFICIENCY T-modell came standard with a comprehensive array of features, including automatic climate control, a multi-function steering wheel, power windows and mirrors, and a basic audio system. Upholstery typically consisted of fabric seats, though leather options were available. Common optional extras included a sunroof, navigation system, upgraded audio systems (often from Harman Kardon), parking sensors, and bi-xenon headlights. The ‘BlueEFFICIENCY’ package also included specific aerodynamic enhancements to reduce drag and improve fuel economy. Trim levels varied slightly depending on the market, but generally offered packages that bundled popular options together.
Chassis & Braking
The S204 C-Class T-modell utilized a McPherson strut front suspension and a multi-link independent rear suspension. This setup provided a good balance between ride comfort and handling precision. Stabilizer bars were fitted to both axles to reduce body roll during cornering. The C 250 CDI was equipped with ventilated disc brakes on all four wheels, providing ample stopping power. Anti-lock braking system (ABS) was standard, along with electronic brakeforce distribution (EBD). The steering system employed a hydraulic power steering rack and pinion, offering a direct and responsive feel.
Market Reception & Comparison
The C 250 CDI BlueEFFICIENCY T-modell was generally well-received by automotive critics. It was praised for its fuel efficiency, comfortable ride, and spacious interior. The diesel engine was noted for its refinement and strong torque output. Compared to the petrol-powered C 250, the CDI offered significantly better fuel economy, making it a more practical choice for high-mileage drivers. However, some critics noted that the manual transmission could feel slightly notchy, and the interior design, while functional, lacked the visual flair of some competitors. The C 250 CDI competed primarily with other premium compact estates, such as the Audi A4 Avant and the BMW 3 Series Touring.
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. With proper maintenance, these engines can easily exceed 200,000 miles. The C 250 CDI T-modell remains a popular choice in the used car market, particularly for buyers seeking a practical, fuel-efficient, and well-built estate car. While modern alternatives offer more advanced technology and features, the S204 C-Class T-modell continues to represent a solid value proposition and a testament to Mercedes-Benz’s engineering prowess.
