The Mercedes-Benz C-Class T-modell (S204) facelift, specifically the C 250 CDI BlueEFFICIENCY variant with the 7G-TRONIC PLUS automatic transmission, was produced from 2011 to 2014. This model represents a mid-cycle refresh of the second-generation C-Class estate (wagon), offering a blend of practicality, efficiency, and luxury. Positioned as a mid-range offering within the T-modell lineup, it aimed to provide a balance between performance and fuel economy, appealing to buyers seeking a versatile and refined vehicle. The S204 platform was a significant step forward for Mercedes-Benz in the compact executive segment, offering improved ride quality and interior refinement compared to its predecessor.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | C-class |
| Generation | C-class T-modell (S204, facelift 2011) |
| Type (Engine) | C 250 CDI BlueEFFICIENCY (204 Hp) 7G-TRONIC PLUS |
| 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) | 6.3-6.4 l/100 km (37.3 – 36.8 US mpg, 44.8 – 44.1 UK mpg, 15.9 – 15.6 km/l) |
| Fuel consumption (extra urban) | 4.3-4.6 l/100 km (54.7 – 51.1 US mpg, 65.7 – 61.4 UK mpg, 23.3 – 21.7 km/l) |
| Fuel consumption (combined) | 5.1-5.3 l/100 km (46.1 – 44.4 US mpg, 55.4 – 53.3 UK mpg, 19.6 – 18.9 km/l) |
| CO2 emissions | 134-138 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 7.4 sec |
| Acceleration 0 – 62 mph | 7.4 sec |
| Acceleration 0 – 60 mph | 7 sec |
| Maximum speed | 237 km/h (147.26 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 and type of gearbox | 7 gears, automatic transmission G-TRONIC PLUS |
| 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 hallmark of Mercedes-Benz’s diesel technology, known for its robust construction and efficiency. It features a common rail direct injection system, delivering fuel at extremely high pressure for optimized combustion. The engine utilizes a twin-turbocharger setup – a smaller turbo for quick response at low engine speeds and a larger turbo for increased power at higher RPMs. An intercooler further enhances performance by cooling the compressed intake air. The engine produces 204 horsepower at 4200 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 strong pulling power for everyday driving and effortless highway cruising. The 7G-TRONIC PLUS automatic transmission, a seven-speed unit, is specifically tuned to complement the engine’s characteristics, offering smooth and efficient gear changes.
Driving Characteristics
The C 250 CDI BlueEFFICIENCY with the 7G-TRONIC PLUS transmission delivers a refined and comfortable driving experience. The abundance of low-end torque makes it feel surprisingly quick in real-world conditions, with brisk acceleration from a standstill and ample power for overtaking. While not a sports car, the engine provides sufficient performance for most drivers. The 7G-TRONIC PLUS transmission contributes to this smoothness, shifting gears almost imperceptibly. Compared to the manual transmission versions, the automatic offers greater convenience, particularly in urban traffic. Compared to higher-output C-Class variants like the C 350, the C 250 CDI prioritizes fuel efficiency over outright speed. The gear ratios are optimized for economy, resulting in lower engine speeds at highway cruising speeds.
Equipment & Trim Levels
The C 250 CDI BlueEFFICIENCY typically came standard with features such as automatic climate control, a multi-function steering wheel, power windows and mirrors, and a basic audio system. Interior upholstery was generally a combination of fabric and Artico (Mercedes’ synthetic leather). Optional extras included leather upholstery, a sunroof, a navigation system, upgraded audio systems (often from Harman Kardon), and parking sensors. The “BlueEFFICIENCY” designation indicated the inclusion of fuel-saving technologies like start-stop functionality and optimized aerodynamics.
Chassis & Braking
The S204 C-Class T-modell features an independent suspension system all around. The front utilizes a McPherson strut setup, while the rear employs a multi-link suspension. This configuration provides a good balance between ride comfort and handling. Stabilizer bars are fitted to both axles to reduce body roll during cornering. Braking duties are handled by ventilated disc brakes on all four wheels, providing ample stopping power. ABS (Anti-lock Braking System) is standard, enhancing safety and control. The suspension tuning was generally geared towards comfort, making it a pleasant vehicle for long journeys.
Market Reception & Comparison
The C 250 CDI BlueEFFICIENCY was well-received by critics for its fuel efficiency and refined driving experience. It offered a compelling alternative to petrol-powered C-Class models, particularly for drivers who covered high mileage. Compared to the C 300 or C 350, the C 250 CDI offered similar levels of luxury and features at a lower price point, albeit with slightly less power. Its fuel economy was significantly better than the higher-output variants, making it an attractive option for cost-conscious buyers. Reliability was generally good, although diesel particulate filter (DPF) issues could occasionally arise, particularly with vehicles primarily used for short trips.
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 to withstand high mileage with proper maintenance. On the used car market, the C 250 CDI T-modell remains a popular choice for those seeking a practical, efficient, and well-built estate car. While newer C-Class models offer more advanced technology and features, the S204 C 250 CDI continues to represent a good value proposition, offering a blend of comfort, practicality, and fuel economy that remains competitive even today. Regular maintenance, including timely oil changes and DPF servicing, is crucial to ensure the long-term health of this powertrain.
