The Mercedes-Benz C-Class (W204) C 220 CDI BlueEFFICIENCY, produced from 2009 to 2011, represented a significant iteration of Mercedes-Benz’s compact executive car. Positioned as a fuel-efficient diesel option within the W204 range, it aimed to balance performance with economy, appealing to buyers seeking a refined driving experience without excessive running costs. This variant utilized a 2.1-liter turbocharged diesel engine producing 170 horsepower, and was typically offered with both manual and automatic transmissions, though the automatic was a popular choice in many markets. The C 220 CDI BlueEFFICIENCY played a key role in establishing the W204 as a competitive offering in the premium sedan segment, particularly in Europe where diesel engines held a strong market share.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | C-class |
| Generation | C-class (W204) |
| Type (Engine) | C 220 CDI BlueEFFICIENCY (170 Hp) |
| Start of production | 2009 year |
| End of production | 2011 year |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (economy) – urban (NEDC) | 6.2-6.7 l/100 km (37.9 – 35.1 US mpg, 45.6 – 42.2 UK mpg, 16.1 – 14.9 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 4-4.6 l/100 km (58.8 – 51.1 US mpg, 70.6 – 61.4 UK mpg, 25 – 21.7 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 4.8-5.4 l/100 km (49 – 43.6 US mpg, 58.9 – 52.3 UK mpg, 20.8 – 18.5 km/l) |
| CO2 emissions (NEDC) | 127-143 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 8.4 sec |
| Acceleration 0 – 62 mph | 8.4 sec |
| Acceleration 0 – 60 mph | 8 sec (Calculated) |
| Maximum speed | 232 km/h (144.16 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 9 kg/Hp, 110.7 Hp/tonne |
| Weight-to-torque ratio | 3.8 kg/Nm, 260.6 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 | 1535 kg (3384.1 lbs.) |
| Max. weight | 2115 kg (4662.78 lbs.) |
| Max load | 580 kg (1278.68 lbs.) |
| Trunk (boot) space – minimum | 475 l (16.77 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 | 4581 mm (180.35 in.) |
| Width | 1770 mm (69.69 in.) |
| Width including mirrors | 2009 mm (79.09 in.) |
| Height | 1447 mm (56.97 in.) |
| Wheelbase | 2760 mm (108.66 in.) |
| Front track | 1549 mm (60.98 in.) |
| Rear (Back) track | 1552 mm (61.1 in.) |
| Front overhang | 765 mm (30.12 in.) |
| Rear overhang | 1056 mm (41.57 in.) |
| Drag coefficient (Cd) | 0.28 |
| Minimum turning circle | 10.84 m (35.56 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 6 gears, manual transmission |
| 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 |
INTRODUCTION
The W204 C-Class, launched in 2007, represented a significant step forward for Mercedes-Benz in terms of build quality and technology. The C 220 CDI BlueEFFICIENCY, introduced in 2009, was a key component of this generation, offering a compelling blend of performance and fuel efficiency. It was designed to appeal to buyers who wanted the prestige of a Mercedes-Benz but were also mindful of running costs. The “BlueEFFICIENCY” designation indicated the inclusion of various fuel-saving technologies, such as optimized aerodynamics, reduced rolling resistance tires, and a revised engine management system. This variant sat in the mid-range of the C-Class lineup, offering a step up from the base C 180 Kompressor but remaining below the more powerful C 250 CDI and C 350 models.
Powertrain & Engine Architecture
The heart of the C 220 CDI BlueEFFICIENCY is the OM 651.911 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 variable geometry turbocharger. The common-rail system, supplied by Bosch, allowed for precise control of fuel delivery, optimizing combustion and reducing emissions. The turbocharger, with its variable geometry vanes, provided a broad torque curve and minimized turbo lag. The engine also incorporated an intercooler to further enhance performance. The C 220 CDI utilized a six-speed automatic transmission (typically the 7G-TRONIC), known for its smooth shifting and efficiency. This transmission offered a manual shift mode for greater driver control. The engine’s architecture was designed for durability and refinement, with features like a balance shaft to minimize vibrations.
Driving Characteristics
The C 220 CDI BlueEFFICIENCY, with its 170 horsepower and 400 Nm (295 lb-ft) of torque, offered a comfortable and capable driving experience. While not overtly sporty, the engine provided ample power for everyday driving and overtaking maneuvers. The automatic transmission contributed to a relaxed driving style, with smooth gear changes and a responsive kickdown function. Compared to the manual transmission version, the automatic offered greater convenience, particularly in urban traffic. However, the manual version generally provided slightly better fuel economy and a more engaging driving experience. Compared to the more powerful C 250 CDI, the C 220 CDI felt less urgent in acceleration, but its lower power output also resulted in improved fuel efficiency. The gear ratios were tuned for a balance between fuel economy and performance, with a relatively tall final drive to maximize efficiency at highway speeds.
Equipment & Trim Levels
The C 220 CDI BlueEFFICIENCY came standard with a respectable level of equipment. This typically included automatic climate control, a multi-function steering wheel, power windows and mirrors, and a basic audio system. Upholstery was usually a combination of fabric and Artico (Mercedes-Benz’s synthetic leather). Optional extras were plentiful, including leather upholstery, a sunroof, a navigation system, parking sensors, and upgraded audio systems. The “BlueEFFICIENCY” package itself included features like aerodynamic enhancements and low rolling resistance tires. Trim levels varied depending on the market, but generally offered progressively more luxurious features and options as you moved up the range.
Chassis & Braking
The W204 C-Class featured a sophisticated chassis design, with an independent multi-link suspension at the rear and a McPherson strut front suspension. This setup provided a good balance between ride comfort and handling. The C 220 CDI, being a mid-range model, typically came equipped with ventilated disc brakes at the front and solid disc brakes at the rear. Anti-lock braking system (ABS) and electronic stability control (ESP) were standard safety features. The suspension was tuned to provide a comfortable ride, but also offered reasonable body control in corners. Stabilizer bars were fitted front and rear to reduce body roll.
Market Reception & Comparison
The C 220 CDI BlueEFFICIENCY was generally well-received by automotive critics. It was praised for its fuel efficiency, refined engine, and comfortable ride. However, some critics noted that the interior design, while well-built, was somewhat conservative compared to its rivals. Compared to competitors like the BMW 320d and Audi A4 2.0 TDI, the C 220 CDI offered a similar level of performance and fuel economy, but was often perceived as being slightly more luxurious and refined. In terms of reliability, the OM 651 engine proved to be a robust and durable unit, although some owners reported issues with the diesel particulate filter (DPF) system, particularly on vehicles used primarily for short journeys.
Legacy
The C 220 CDI BlueEFFICIENCY has proven to be a reliable and durable vehicle in the used car market. The OM 651 engine is known for its longevity, and with proper maintenance, can easily exceed 200,000 miles. However, potential buyers should be aware of the potential for DPF issues and ensure that the vehicle has been regularly serviced. Today, the W204 C-Class remains a popular choice for buyers seeking a well-built, comfortable, and fuel-efficient executive car at an affordable price. The C 220 CDI BlueEFFICIENCY, in particular, represents a sweet spot in the range, offering a good balance of performance, economy, and refinement.
