The Mercedes-Benz C 200 CDI BlueEFFICIENCY, produced between 2009 and 2011, was a key variant within the W204 C-Class range. Positioned as a fuel-efficient and relatively affordable entry point into the C-Class lineup, it catered to buyers prioritizing economy and refinement over outright performance. This model combined a 2.1-liter turbocharged diesel engine with the 5G-TRONIC automatic transmission, offering a balance between comfort and practicality. It was primarily marketed in Europe and other regions where diesel engines held significant market share, offering a compelling alternative to gasoline-powered competitors.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | C-class |
| Generation | C-class (W204) |
| Type (Engine) | C 200 CDI BlueEFFICIENCY (136 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) | 7.4-8.1 l/100 km (31.8 – 29 US mpg, 38.2 – 34.9 UK mpg, 13.5 – 12.3 km/l) |
| Fuel consumption (extra urban) | 4.4-5.2 l/100 km (53.5 – 45.2 US mpg, 64.2 – 54.3 UK mpg, 22.7 – 19.2 km/l) |
| Fuel consumption (combined) | 5.5-6.3 l/100 km (42.8 – 37.3 US mpg, 51.4 – 44.8 UK mpg, 18.2 – 15.9 km/l) |
| CO2 emissions | 144-164 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 9.7 sec |
| Acceleration 0 – 62 mph | 9.7 sec |
| Acceleration 0 – 60 mph | 9.2 sec |
| Maximum speed | 214 km/h (132.97 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 11.1 kg/Hp, 89.8 Hp/tonne |
| Weight-to-torque ratio | 4.6 kg/Nm, 217.8 Nm/tonne |
| Power | 136 Hp @ 2800-4600 rpm |
| Power per litre | 63.5 Hp/l |
| Torque | 330 Nm @ 1600-2800 rpm (243.4 lb.-ft. @ 1600-2800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 651.913 |
| 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 | 17.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant capacity | 10 l (10.57 US qt | 8.8 UK qt) |
| Kerb Weight | 1515 kg (3340 lbs.) |
| Max. weight | 2095 kg (4618.68 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) |
| Max. roof load | 100 kg (220.46 lbs.) |
| 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.) |
| Drag coefficient (Cd) | 0.26 |
| 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 | 195/60 R16 |
| Wheel rims size | 6J x 16 |
INTRODUCTION
The C 200 CDI BlueEFFICIENCY, launched in 2009 as part of the W204 C-Class facelift, represented Mercedes-Benz’s commitment to improving fuel efficiency without sacrificing the core values of comfort and build quality. The W204 platform, introduced in 2007, aimed to bridge the gap between the more affordable CLC-Class and the larger, more luxurious E-Class. The “BlueEFFICIENCY” designation signified a range of measures taken to reduce fuel consumption and emissions, including optimized aerodynamics, reduced rolling resistance tires, and a revised engine management system. This variant occupied the lower-mid range of the C-Class lineup, sitting above the base C 180 Kompressor but below the more powerful C 220 CDI and C 250 CDI models.
Powertrain & Engine Architecture
At the heart of the C 200 CDI BlueEFFICIENCY lies the OM 651.913 2.1-liter inline-four cylinder diesel engine. This engine, a cornerstone of Mercedes-Benz’s diesel offerings, is characterized by its robust construction and advanced technology. It utilizes a second-generation common rail direct injection system, delivering fuel at pressures up to 1600 bar for improved combustion efficiency and reduced noise. The engine also features a variable geometry turbocharger (VGT) with an intercooler, providing a broad torque curve and responsive performance. The DOHC (Double Overhead Camshaft) valvetrain, with four valves per cylinder, further enhances breathing and contributes to the engine’s power output. The 5G-TRONIC automatic transmission, a five-speed torque converter automatic, was specifically calibrated to work seamlessly with the diesel engine’s characteristics. It prioritizes smooth shifts and fuel efficiency, although it lacks the responsiveness of more modern transmissions with a greater number of gears.
Driving Characteristics
The C 200 CDI BlueEFFICIENCY offered a comfortable and refined driving experience, prioritizing ease of use over sporty handling. The 136 horsepower and 330 Nm (243 lb-ft) of torque provided adequate performance for everyday driving, with a 0-60 mph time of around 9.2 seconds. While not particularly quick, the engine’s strong low-end torque made it well-suited for overtaking maneuvers and cruising on the highway. The 5G-TRONIC transmission, while smooth, could feel somewhat sluggish during quick acceleration, and the limited number of gears meant the engine often operated at higher RPMs during highway driving. Compared to the more powerful C 220 CDI, the C 200 CDI felt noticeably less energetic, but it offered a significant improvement in fuel economy. The manual transmission, available on other C-Class models, provided a more engaging driving experience but was less popular due to the preference for automatic transmissions in this segment.
Equipment & Trim Levels
The C 200 CDI BlueEFFICIENCY typically came equipped with a respectable level of standard features. These included automatic climate control, a multi-function steering wheel, electric windows, and a basic audio system. Interior upholstery was typically cloth, although leather options were available as upgrades. Optional extras included a sunroof, navigation system, upgraded audio systems, and parking sensors. The “BlueEFFICIENCY” package itself included features like low rolling resistance tires and aerodynamic enhancements. Trim levels varied slightly depending on the market, but generally, the C 200 CDI BlueEFFICIENCY was positioned as a well-equipped but not overly luxurious variant.
Chassis & Braking
The W204 C-Class featured a fully independent suspension system, with McPherson struts at the front and a multi-link setup at the rear. This provided a comfortable ride quality and good handling characteristics. The C 200 CDI, being a lower-powered variant, typically featured smaller brake discs compared to the higher-performance models. Front brakes were ventilated discs, while rear brakes were solid discs. Anti-lock Braking System (ABS) was standard, providing enhanced braking safety. Stabilizer bars were fitted to both the front and rear axles to reduce body roll during cornering. The steering system was a hydraulic power steering rack and pinion, offering a balanced feel and good feedback.
Market Reception & Comparison
The C 200 CDI BlueEFFICIENCY was generally well-received by critics for its fuel efficiency and comfortable ride. It was praised as a practical and economical choice for those seeking a premium compact sedan. However, some reviewers noted that the engine lacked the punch of its more powerful counterparts and that the 5G-TRONIC transmission could feel dated. Compared to the C 220 CDI, the C 200 CDI offered better fuel economy but less performance. Against competitors like the BMW 320d EfficientDynamics and Audi A4 2.0 TDI, the C 200 CDI held its own in terms of fuel economy and refinement, but often lagged slightly in terms of driving dynamics.
Legacy
The OM 651 engine, used in the C 200 CDI BlueEFFICIENCY, has proven to be a remarkably durable and reliable powerplant. With proper maintenance, these engines can easily exceed 200,000 miles. The 5G-TRONIC transmission, while not as sophisticated as modern automatics, is also generally reliable, although it may require fluid changes and occasional servicing. In the used car market, the C 200 CDI BlueEFFICIENCY remains a popular choice for those seeking a fuel-efficient and well-built compact sedan. Its relatively low running costs and proven reliability make it an attractive option for budget-conscious buyers. However, potential buyers should be aware of the age of the vehicle and the potential for wear and tear on components like the suspension and brakes.
