The Mercedes-Benz C-Class (W204) C 220 CDI BlueEFFICIENCY, equipped with the 5G-TRONIC automatic transmission, was a key variant in the popular C-Class range produced between 2009 and 2011. Positioned as a fuel-efficient and refined option, it aimed to balance performance with economy, appealing to buyers seeking a comfortable and practical luxury sedan. This model represented a significant step in Mercedes-Benz’s efforts to improve fuel efficiency across its lineup, incorporating BlueEFFICIENCY technologies. It was part of the W204 generation, which saw substantial improvements in build quality and interior design compared to its predecessor.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | C-class |
| Generation | C-class (W204) |
| Type (Engine) | C 220 CDI BlueEFFICIENCY (170 Hp) 5G-TRONIC |
| Start of production | 2009 |
| End of production | 2011 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 8.1-8.5 l/100 km (29 – 27.7 US mpg) |
| Fuel consumption (extra urban) | 4.4-5.1 l/100 km (53.5 – 46.1 US mpg) |
| Fuel consumption (combined) | 5.8-6.4 l/100 km (40.6 – 36.8 US mpg) |
| CO2 emissions | 153-167 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 7.7 sec |
| Acceleration 0 – 62 mph | 7.7 sec |
| Acceleration 0 – 60 mph | 7.3 sec |
| Maximum speed | 231 km/h (143.54 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 9 kg/Hp |
| Weight-to-torque ratio | 3.8 kg/Nm |
| Power | 170 Hp @ 3000-4200 rpm |
| Torque | 400 Nm @ 1400-2800 rpm (295.02 lb.-ft.) |
| 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) | 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 track | 1552 mm (61.1 in.) |
| Front overhang | 765 mm (30.12 in.) |
| Rear overhang | 1056 mm (41.57 in.) |
| Minimum turning circle | 10.84 m (35.56 ft.) |
| Drivetrain | Rear wheel drive |
| Number of gears | 5 |
| 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 C 220 CDI BlueEFFICIENCY utilized the OM 651.911, a 2.1-liter inline-four cylinder diesel engine. This engine was a cornerstone of Mercedes-Benz’s diesel offerings during this period, known for its robust construction and relatively quiet operation for a diesel. The ‘BlueEFFICIENCY’ designation indicated the inclusion of fuel-saving technologies such as optimized aerodynamics, reduced rolling resistance tires, and an enhanced engine management system. The engine featured a common rail direct injection system, delivering fuel at extremely high pressure for improved combustion efficiency and reduced emissions. A twin-turbocharger setup, incorporating a small, low-pressure turbo and a larger, high-pressure turbo, provided a broad torque curve and minimized turbo lag. The 5G-TRONIC transmission was a five-speed automatic gearbox, known for its smooth shifts and reliability. It was programmed to prioritize fuel economy, with taller gear ratios in the higher gears.
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 0-60 mph took around 7.3 seconds, making it competitive with other diesel-powered sedans in its class. However, it wasn’t designed for outright speed; the focus was on effortless cruising and fuel efficiency. The automatic transmission, while smooth, could feel somewhat sluggish compared to the available manual transmission, particularly during quick overtaking maneuvers. The engine’s peak torque was available from a low 1400 rpm, providing strong pulling power at lower speeds, which was beneficial for city driving and highway merging. The gear ratios were optimized for economy, meaning the engine often operated at lower RPMs during cruising, contributing to its impressive fuel consumption figures.
Equipment & Trim Levels
The C 220 CDI BlueEFFICIENCY typically came standard with features such as automatic climate control, power windows, power mirrors, a multi-function steering wheel, and an audio system with CD player. Upholstery was generally a cloth material, although leather options were available as upgrades. Optional extras included a sunroof, navigation system, premium sound system, and parking sensors. The trim level could vary depending on the market, but generally, the C 220 CDI BlueEFFICIENCY occupied a mid-range position in the C-Class lineup, offering a good balance of features and affordability.
Chassis & Braking
The W204 C-Class featured a McPherson strut front suspension and a multi-link independent rear suspension. This setup provided a comfortable ride while maintaining good handling characteristics. The C 220 CDI, due to its weight, often had slightly stiffer spring rates compared to lighter models. Braking duties were handled by ventilated discs at the front and solid discs at the rear. Anti-lock Braking System (ABS) was standard, providing enhanced braking performance and stability. The steering was a hydraulic power steering system, offering a good balance of feel and assistance.
Market Reception & Comparison
The C 220 CDI BlueEFFICIENCY was generally well-received by automotive critics for its fuel efficiency and comfortable ride. It was often praised for its refined engine and smooth-shifting transmission. However, some reviewers noted that the performance wasn’t as exhilarating as some of its competitors, particularly the higher-powered C-Class variants like the C 350. Compared to the C 250 CDI, which offered more power, the C 220 CDI prioritized economy. Against gasoline-powered models, the C 220 CDI offered significantly better fuel economy, making it an attractive option for drivers covering long distances. Reliability was generally good, although diesel particulate filter (DPF) issues could occur if the vehicle was primarily used for short trips.
Legacy
The OM 651 engine family, including the 2.1-liter variant used in the C 220 CDI, proved to be remarkably durable. Many examples are still on the road today with high mileage. The 5G-TRONIC transmission, while not the most advanced automatic available at the time, is also known for its reliability. In the used car market, the C 220 CDI BlueEFFICIENCY remains a popular choice for buyers seeking a fuel-efficient and comfortable luxury sedan. However, potential buyers should be aware of the potential for DPF issues and ensure the vehicle has been properly maintained. The C 220 CDI BlueEFFICIENCY represents a significant step in Mercedes-Benz’s commitment to diesel technology and fuel efficiency, and it continues to be a respected and capable vehicle.
