The Mercedes-Benz C-Class T-modell (S204), specifically the C 220 CDI BlueEFFICIENCY variant with the 7G-TRONIC PLUS automatic transmission, was produced from 2011 to 2014. This model represents a facelift of the second-generation C-Class estate (wagon), designated S204, and aimed to offer a balance of fuel efficiency, practicality, and comfort within the premium compact executive segment. Positioned as a mid-range offering within the T-modell lineup, it slotted between the lower-powered C 200 CDI and the more performance-oriented C 250 CDI models. The “BlueEFFICIENCY” designation indicated Mercedes-Benz’s efforts to improve fuel economy and reduce emissions through various technological enhancements.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | C-Class |
| Generation | C-Class T-modell (S204, facelift 2011) |
| Type (Engine) | C 220 CDI BlueEFFICIENCY (170 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 | 8.3 sec |
| Acceleration 0 – 62 mph | 8.3 sec |
| Acceleration 0 – 60 mph | 7.9 sec |
| Maximum speed | 219 km/h (136.08 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 9.4 kg/Hp, 106.9 Hp/tonne |
| Weight-to-torque ratio | 4 kg/Nm, 251.6 Nm/tonne |
| Power | 170 Hp @ 3000-4200 rpm |
| Power per litre | 79.3 Hp/l |
| Torque | 400 Nm @ 1400-2800 rpm (295.02 lb.-ft. @ 1400-2800 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 | 1590 kg (3505.35 lbs.) |
| Max. weight | 2205 kg (4861.19 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 | Disc |
| 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 220 CDI BlueEFFICIENCY is powered by the OM 651.911, a 2.1-liter inline-four cylinder diesel engine. This engine is a highly advanced design for its time, featuring common-rail direct injection and a twin-turbocharger setup. The twin-turbo system employs a smaller turbocharger for quick response at low engine speeds and a larger turbocharger to maintain power at higher RPMs. An intercooler is used to cool the compressed intake air, increasing its density and further improving performance. The engine boasts a high compression ratio of 16.2:1, contributing to its efficiency. The 7G-TRONIC PLUS automatic transmission, a seven-speed unit, was a key component in maximizing fuel economy and providing smooth gear changes. This transmission offered selectable driving modes, allowing drivers to prioritize comfort or performance.
Driving Characteristics
The 170 horsepower and 400 Nm (295 lb-ft) of torque delivered by the C 220 CDI BlueEFFICIENCY provided adequate performance for everyday driving. Acceleration from 0 to 60 mph took approximately 7.9 seconds, and the car had a top speed of 219 km/h (136 mph). While not a sports car, the engine offered a broad torque curve, making it responsive in most driving situations. Compared to the more powerful C 250 CDI, the C 220 CDI felt less urgent in acceleration, but the 7G-TRONIC PLUS transmission helped to keep the engine in its optimal power band. The automatic transmission, while smooth, could sometimes feel hesitant during quick downshifts. The rear-wheel-drive configuration provided a balanced driving experience, though it lacked the all-weather capability of the 4MATIC all-wheel-drive system available on other C-Class models.
Equipment & Trim Levels
The C 220 CDI BlueEFFICIENCY typically came standard with features such as automatic climate control, a multi-function steering wheel, and a basic audio system. Interior upholstery was usually a combination of fabric and Artico (Mercedes’ synthetic leather). Optional extras included leather upholstery, a premium sound system, navigation system, sunroof, and parking sensors. The “BlueEFFICIENCY” package included features like low rolling resistance tires and optimized aerodynamics to improve fuel economy. Trim levels varied depending on the market, but generally offered packages that added convenience and luxury features.
Chassis & Braking
The S204 C-Class T-modell utilized an independent suspension system all around. The front suspension employed McPherson struts with a transverse stabilizer, while the rear featured a multi-link setup, also with a stabilizer bar. This suspension configuration provided a comfortable ride and good handling characteristics. Braking duties were handled by ventilated discs at the front and solid discs at the rear. Anti-lock Braking System (ABS) was standard, enhancing safety during emergency braking situations. The steering was a rack-and-pinion system with hydraulic power assistance.
Market Reception & Comparison
The C 220 CDI BlueEFFICIENCY was generally well-received by automotive critics as a practical and efficient estate car. It was praised for its fuel economy, comfortable ride, and spacious interior. However, some reviewers noted that the engine could be somewhat noisy and that the interior, while well-built, lacked the visual flair of some competitors. Compared to the C 200 CDI, the C 220 CDI offered a noticeable performance improvement. Against the C 250 CDI, it represented a more affordable option, albeit with less power. Competitors in this segment included the Audi A4 Avant, BMW 3 Series Touring, and Volvo V60.
Legacy
The OM 651 engine family, including the 2.1-liter variant used in the C 220 CDI, has proven to be remarkably durable and reliable. With proper maintenance, these engines can accumulate high mileage without major issues. The 7G-TRONIC PLUS transmission is also generally considered reliable, although some units have experienced issues with the valve body. On the used car market, the C 220 CDI BlueEFFICIENCY T-modell remains a popular choice for buyers seeking a practical, fuel-efficient, and well-built estate car. Its combination of comfort, space, and reasonable running costs continues to make it a compelling option in the premium compact segment.
