The Mercedes-Benz C-Class (W204) C 220 CDI 5G-TRONIC, produced from 2007 to 2009, represented a significant offering in the compact executive car segment. Positioned as a diesel-powered variant within the broader W204 range, it aimed to provide a balance of fuel efficiency, refinement, and performance. This model occupied a middle ground in the C-Class lineup, offering a step up from the base C 180 CDI while remaining more accessible than the higher-performance C 320 CDI or petrol-powered options. It was primarily marketed in Europe and other regions where diesel engines held significant market share, offering a compelling alternative to gasoline vehicles.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | C-class |
| Generation | C-class (W204) |
| Type (Engine) | C 220 CDI (170 Hp) 5G-TRONIC |
| Start of production | 2007 |
| End of production | 2009 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 9.1-9.2 l/100 km (25.8 – 25.6 US mpg) |
| Fuel consumption (extra urban) | 5.1-5.3 l/100 km (46.1 – 44.4 US mpg) |
| Fuel consumption (combined) | 6.6-6.7 l/100 km (35.6 – 35.1 US mpg) |
| CO2 emissions | 173 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 |
| Maximum speed | 227 km/h (141.05 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 9 kg/Hp |
| Weight-to-torque ratio | 3.8 kg/Nm |
| Power | 170 Hp @ 3800 rpm |
| Torque | 400 Nm @ 2000 rpm (295.02 lb.-ft. @ 2000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 646.811 |
| Engine displacement | 2148 cm3 (131.08 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 88 mm (3.46 in.) |
| Piston Stroke | 88.3 mm (3.48 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) |
| Kerb Weight | 1530 kg (3373.07 lbs.) |
| Max. weight | 2090 kg (4607.66 lbs.) |
| Max load | 560 kg (1234.59 lbs.) |
| Trunk (boot) space (minimum) | 475 l (16.77 cu. ft.) |
| Fuel tank capacity | 66 l (17.44 US gal | 14.52 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.) |
| Permitted towbar download | 75 kg (165.35 lbs.) |
| Length | 4581 mm (180.35 in.) |
| Width | 1770 mm (69.69 in.) |
| Width including mirrors | 2020 mm (79.53 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) | 0.28 |
| Minimum turning circle | 10.84 m (35.56 ft.) |
| Drivetrain Architecture | 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 |
INTRODUCTION
The W204 Mercedes-Benz C-Class, launched in 2007, represented the third generation of this popular model. The C 220 CDI 5G-TRONIC, a diesel-powered variant, was a key component of the lineup, particularly in European markets. It utilized the OM646 engine family, a mainstay of Mercedes-Benz diesel offerings, coupled with the 5G-TRONIC automatic transmission. This combination aimed to deliver a refined driving experience with competitive fuel economy. The W204 platform itself was a significant step forward, offering improved build quality, enhanced safety features, and a more sophisticated interior compared to its predecessor.
Powertrain & Engine Architecture
The heart of the C 220 CDI is the OM646.811 2.1-liter inline-four cylinder diesel engine. This engine is a turbocharged common rail direct injection diesel, known for its robust construction and relatively good efficiency. The OM646 series engines were widely used across various Mercedes-Benz and Chrysler models. The 5G-TRONIC transmission is a five-speed automatic gearbox, designed to provide smooth and efficient gear changes. It features a torque converter and electronic control for optimized shift points. The engine produces 170 horsepower at 3800 rpm and a substantial 400 Nm (295 lb-ft) of torque at 2000 rpm. The common rail direct injection system, operating at very high pressures, ensures precise fuel delivery and contributes to both power and fuel efficiency. The turbocharger, coupled with an intercooler, further enhances performance by increasing air intake density. The engine also incorporates a diesel particulate filter (DPF) to reduce emissions, complying with Euro 4 standards.
Driving Characteristics
The C 220 CDI 5G-TRONIC offers a comfortable and relaxed driving experience. While not a sports-oriented variant, the 400 Nm of torque provides ample pulling power for everyday driving and overtaking maneuvers. The 5G-TRONIC transmission contributes to smooth gear changes, although it can sometimes feel slightly hesitant compared to more modern automatic transmissions. Acceleration from 0 to 100 km/h (0-62 mph) takes around 8.4 seconds, which is respectable for a diesel-powered executive car of this era. The automatic transmission’s gear ratios are tuned for fuel efficiency, prioritizing smooth cruising over outright performance. Compared to the manual transmission versions of the C 220 CDI, the automatic offers greater convenience, but typically results in slightly slower acceleration and marginally lower fuel economy. Higher-output variants, such as the C 320 CDI, provide significantly more power but at the expense of fuel efficiency and increased running costs.
Equipment & Trim Levels
The C 220 CDI 5G-TRONIC typically came equipped with a reasonable level of standard features. These included automatic climate control, power windows, central locking, and an audio system. Interior upholstery was generally cloth, with leather options available as an upgrade. Dashboard trim could vary depending on the specific package selected. Optional extras included a sunroof, navigation system, upgraded audio systems, and parking sensors. Safety features such as ABS, traction control, and multiple airbags were standard. The trim level could influence the availability of certain features, with higher-spec models offering more luxurious appointments and advanced technology.
Chassis & Braking
The W204 C-Class features an independent suspension system all around, with a McPherson strut setup at the front and a multi-link suspension at the rear. This configuration provides a good balance of ride comfort and handling. The C 220 CDI typically used ventilated disc brakes at the front and solid disc brakes at the rear. ABS (Anti-lock Braking System) was standard, enhancing braking performance and stability. The suspension was tuned to provide a comfortable ride, prioritizing refinement over sporty handling. Stabilizer bars were fitted to both the front and rear axles to reduce body roll during cornering.
Market Reception & Comparison
The C 220 CDI 5G-TRONIC was generally well-received by automotive critics. It was praised for its fuel efficiency, comfortable ride, and refined engine. However, some reviewers noted that the 5G-TRONIC transmission could feel a bit dated compared to newer automatic gearboxes. Compared to the C 180 CDI, the C 220 CDI offered noticeably more power and performance. Compared to the C 320 CDI, it provided a more affordable option with slightly lower running costs. Fuel economy was a key selling point, with the C 220 CDI achieving around 35-40 mpg in real-world driving conditions. Reliability was generally good, although diesel particulate filters could require occasional maintenance or replacement.
Legacy
The OM646 engine, found in the C 220 CDI, has proven to be a durable and reliable powerplant when properly maintained. The 5G-TRONIC transmission, while not without its quirks, is also generally considered to be a robust unit. In the used car market, the W204 C 220 CDI 5G-TRONIC remains a popular choice for those seeking a comfortable, fuel-efficient, and relatively affordable executive car. However, potential buyers should be aware of the potential costs associated with maintaining a diesel vehicle, including DPF maintenance and potential injector issues. Overall, the C 220 CDI 5G-TRONIC represents a solid and dependable option within the W204 C-Class range.
