The Mercedes-Benz C-Class T-modell (S204) C 180 CGI BlueEFFICIENCY, equipped with the 5G-TRONIC automatic transmission, was a variant produced between 2009 and 2011. Positioned as an entry-level offering within the S204 estate (wagon) range, it aimed to provide a balance of practicality, fuel efficiency, and Mercedes-Benz refinement. This model occupied a space below the more powerful C 250 CGI and C 350 CGI variants, and also differed significantly from the diesel-powered C 220 CDI and C 250 CDI models popular in Europe. The “BlueEFFICIENCY” designation denoted 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) |
| Type (Engine) | C 180 CGI BlueEFFICIENCY (156 Hp) 5G-TRONIC |
| Start of production | 2009 |
| End of production | 2011 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Station wagon (estate) |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 10.3-10.8 l/100 km (22.8 – 21.8 US mpg) |
| Fuel consumption (extra urban) | 5.7-6.4 l/100 km (41.3 – 36.8 US mpg) |
| Fuel consumption (combined) | 7.4-8 l/100 km (31.8 – 29.4 US mpg) |
| CO2 emissions | 172-186 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 9.2 sec |
| Acceleration 0 – 62 mph | 9.2 sec |
| Acceleration 0 – 60 mph | 8.7 sec |
| Maximum speed | 213 km/h (132.35 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 9.5 kg/Hp |
| Weight-to-torque ratio | 5.9 kg/Nm |
| Power | 156 Hp @ 5000 rpm |
| Torque | 250 Nm @ 1600-4200 rpm (184.39 lb.-ft. @ 1600-4200 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 271.820 |
| Engine displacement | 1796 cm3 (109.6 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 82 mm (3.23 in.) |
| Piston Stroke | 85 mm (3.35 in.) |
| Compression ratio | 9.3:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 5.5 l (5.81 US qt | 4.84 UK qt) |
| Kerb Weight | 1480 kg (3262.84 lbs.) |
| Max. weight | 2095 kg (4618.68 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) |
| Permitted trailer load with brakes (12%) | 1800 kg (3968.32 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Length | 4596 mm (180.94 in.) |
| Width | 1770 mm (69.69 in.) |
| Width including mirrors | 2009 mm (79.09 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 | 765 mm (30.12 in.) |
| Rear overhang | 1071 mm (42.17 in.) |
| 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 | 5 gears, 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 180 CGI BlueEFFICIENCY utilized the M271.820 1.8-liter inline-four cylinder engine. This engine was a key component of Mercedes-Benz’s efforts to improve fuel efficiency without sacrificing performance. The “CGI” designation stood for “Charged Gasoline Injection,” indicating the engine’s use of direct fuel injection and a turbocharger with an intercooler. Direct injection allowed for more precise fuel delivery, improving combustion efficiency and reducing emissions. The turbocharger boosted power output, compensating for the relatively small displacement. The engine featured a double overhead camshaft (DOHC) valvetrain with four valves per cylinder, optimizing airflow for increased power. The 5G-TRONIC automatic transmission, a five-speed torque converter automatic, was specifically tuned to work with the engine’s characteristics, prioritizing smooth shifts and fuel economy.
Driving Characteristics
The 156 horsepower and 250 Nm (184 lb-ft) of torque delivered by the C 180 CGI BlueEFFICIENCY provided adequate, but not exhilarating, performance. Acceleration from 0 to 60 mph took approximately 8.7 seconds, and top speed was limited to 132.35 mph. Compared to the more powerful C 250 CGI, the C 180 felt noticeably slower, particularly during overtaking maneuvers. The 5G-TRONIC transmission, while smooth, could sometimes feel hesitant when downshifting for quicker acceleration. The gear ratios were optimized for fuel efficiency rather than outright performance. However, for everyday driving and commuting, the C 180 offered a comfortable and refined experience. The rear-wheel drive configuration provided balanced handling, typical of Mercedes-Benz vehicles.
Equipment & Trim Levels
The C 180 CGI BlueEFFICIENCY typically came standard with features such as automatic climate control, power windows and mirrors, a multi-function steering wheel, and an audio system with CD player. Upholstery was generally cloth, although leather options were available. Optional extras included a sunroof, navigation system, upgraded audio systems, and parking sensors. The “BlueEFFICIENCY” package also included features like low rolling resistance tires and aerodynamic enhancements to further improve fuel economy. Interior trim levels varied, with options for wood or aluminum accents.
Chassis & Braking
The S204 C-Class estate featured an independent suspension system at all four wheels. The front suspension utilized a McPherson strut design with a transverse stabilizer bar, while the rear employed a multi-link setup, also with a stabilizer bar. This configuration provided a good balance of ride comfort and handling. 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 and control during emergency braking situations. The steering system was a rack and pinion type with hydraulic power assistance, offering precise and responsive steering feel.
Market Reception & Comparison
The C 180 CGI BlueEFFICIENCY was generally well-received as a practical and economical option within the C-Class range. Critics praised its fuel efficiency and comfortable ride, but some found the performance to be somewhat lacking, especially when compared to the more powerful variants. Compared to the C 220 CDI diesel, the C 180 offered a quieter and smoother driving experience, but at the expense of fuel economy. The C 250 CGI provided significantly more power and performance, but came with a higher price tag and increased running costs. The C 180 appealed to buyers who prioritized fuel efficiency and comfort over outright performance.
Legacy
The M271 engine, while generally reliable, is known to require regular maintenance, particularly regarding the timing chain. Oil changes should be performed according to Mercedes-Benz’s recommended intervals to prevent premature wear. The 5G-TRONIC transmission is also relatively reliable, but fluid changes are crucial for maintaining smooth operation. Today, the C 180 CGI BlueEFFICIENCY represents an affordable entry point into Mercedes-Benz ownership. Well-maintained examples can still provide years of reliable service, offering a blend of practicality, comfort, and the prestige of the Mercedes-Benz brand. However, potential buyers should be aware of the potential for timing chain issues and ensure that the vehicle has been properly maintained.
