The Mercedes-Benz C-Class Coupe (C204) facelift, produced from 2011 to 2015, represented a significant refinement of the second-generation C-Class. The C350 BlueEFFICIENCY variant, equipped with a 3.5-liter V6 engine and the 7G-TRONIC PLUS automatic transmission, occupied a mid-to-upper position within the coupe lineup, offering a blend of performance, luxury, and efficiency. This model aimed to appeal to buyers seeking a more engaging driving experience than the four-cylinder options, without the outright sportiness of the AMG models. It was positioned as a grand tourer, comfortable for long distances yet capable of spirited driving.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | C-Class |
| Generation | C-Class Coupe (C204, facelift 2011) |
| Type (Engine) | C 350 BlueEFFICIENCY V6 (306 Hp) 7G-TRONIC PLUS |
| Start of production | 2011 |
| End of production | 2015 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 9.4-9.6 l/100 km (25 – 24.5 US mpg) |
| Fuel consumption (extra urban) | 5.3-5.6 l/100 km (44.4 – 42 US mpg) |
| Fuel consumption (combined) | 6.8-7 l/100 km (34.6 – 33.6 US mpg) |
| CO2 emissions | 159-164 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6 sec |
| Acceleration 0 – 62 mph | 6 sec |
| Acceleration 0 – 60 mph | 5.7 sec |
| Maximum speed | 250 km/h (155.34 mph) – Electronically limited |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 5 kg/Hp |
| Weight-to-torque ratio | 4.2 kg/Nm |
| Power | 306 Hp @ 6500 rpm |
| Torque | 370 Nm @ 3500-5250 rpm (272.9 lb.-ft. @ 3500-5250 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 276.957 |
| Engine displacement | 3498 cm3 (213.46 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 92.9 mm (3.66 in.) |
| Piston Stroke | 86 mm (3.39 in.) |
| Compression ratio | 12:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Kerb Weight | 1540 kg (3395.12 lbs.) |
| Max. weight | 2085 kg (4596.64 lbs.) |
| Max load | 545 kg (1201.52 lbs.) |
| Trunk (boot) space (minimum) | 450 l (15.89 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.) |
| Length | 4590 mm (180.71 in.) |
| Width | 1770 mm (69.69 in.) |
| Width including mirrors | 1997 mm (78.62 in.) |
| Height | 1406 mm (55.35 in.) |
| Wheelbase | 2760 mm (108.66 in.) |
| Front track | 1549 mm (60.98 in.) |
| Rear track | 1552 mm (61.1 in.) |
| Front overhang | 775 mm (30.51 in.) |
| Rear overhang | 1055 mm (41.54 in.) |
| Drag coefficient (Cd) | 0.28 |
| Minimum turning circle | 10.84 m (35.56 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears | 7 |
| Gearbox type | Automatic transmission G-TRONIC PLUS |
| Front suspension | Independent type McPherson, Transverse stabilizer |
| Rear suspension | Independent multi-link suspension, Transverse stabilizer |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 225/45 R17 |
| Wheel rims size | 7.5J x 17 |
INTRODUCTION
The C350 BlueEFFICIENCY Coupe, launched in 2011 as part of the C204 facelift, represented a compelling offering in the entry-level luxury coupe segment. Built on the W204 C-Class platform, the C204 coupe distinguished itself with a more sporting aesthetic and a focus on driver engagement. The “BlueEFFICIENCY” designation indicated Mercedes-Benz’s efforts to improve fuel economy and reduce emissions through various technologies. This variant aimed to bridge the gap between the more affordable C250 and the high-performance C63 AMG models, providing a balance of power, refinement, and practicality.
Powertrain & Engine Architecture
At the heart of the C350 BlueEFFICIENCY lay the M276.957 3.5-liter naturally aspirated V6 engine. This engine was a cornerstone of Mercedes-Benz’s powertrain lineup during this period, known for its smooth operation and robust construction. It featured a 60-degree V-angle, aluminum alloy block and cylinder heads, and a sophisticated direct injection system. The direct injection system, operating at pressures up to 200 bar, precisely meters fuel into the combustion chambers, optimizing combustion efficiency and reducing emissions. The engine also incorporated variable valve timing (VVT) on both intake and exhaust camshafts, further enhancing performance and fuel economy. The 7G-TRONIC PLUS automatic transmission, a seven-speed unit, was specifically tuned to complement the V6 engine’s characteristics. This transmission offered smooth, quick shifts and a wide range of gear ratios, contributing to both performance and efficiency. It also featured a manual shift mode for greater driver control.
Driving Characteristics
The C350 BlueEFFICIENCY Coupe delivered a refined and capable driving experience. The 306 horsepower and 272.9 lb.-ft. of torque provided ample power for both everyday driving and spirited acceleration. The 0-60 mph sprint took approximately 5.7 seconds, making it a competitive performer in its class. The 7G-TRONIC PLUS transmission contributed to seamless gear changes, minimizing disruptions to the driving experience. Compared to the base C250 models, the C350 offered noticeably stronger acceleration and a more confident feel, particularly when overtaking or merging onto highways. While not as aggressively tuned as the C63 AMG, the C350 provided a satisfying level of performance for drivers seeking a balance between comfort and sportiness. The rear-wheel-drive configuration contributed to a balanced chassis and predictable handling.
Equipment & Trim Levels
The C350 BlueEFFICIENCY Coupe came standard with a generous array of features, reflecting its position as a mid-to-upper trim level. Standard equipment typically included leather upholstery, power-adjustable front seats with memory function, dual-zone automatic climate control, a premium audio system, and a sunroof. Safety features such as ABS, traction control, stability control, and multiple airbags were also standard. Optional extras included a navigation system, a rearview camera, parking sensors, and upgraded interior trim options. The interior design emphasized luxury and sophistication, with high-quality materials and meticulous attention to detail. The dashboard layout was clean and intuitive, with a central display screen providing access to various vehicle functions.
Chassis & Braking
The C350 BlueEFFICIENCY Coupe featured a sophisticated suspension system designed to provide a comfortable ride and responsive handling. The front suspension utilized a McPherson strut design, while the rear suspension employed a multi-link setup. Both ends of the suspension incorporated stabilizer bars to reduce body roll during cornering. The braking system consisted of ventilated discs on all four wheels, providing ample stopping power. ABS (Anti-lock Braking System) and electronic brake-force distribution were standard features, enhancing safety and control. The steering system was a rack-and-pinion design with hydraulic power assistance, offering precise and responsive steering feel.
Market Reception & Comparison
The C350 BlueEFFICIENCY Coupe was generally well-received by automotive critics. Reviewers praised its smooth engine, refined ride, and luxurious interior. The combination of performance and fuel economy was also noted as a positive attribute. Compared to its rivals, such as the BMW 3 Series Coupe and the Audi A5 Coupe, the C350 offered a compelling blend of features and value. While some critics found the styling to be somewhat conservative, the overall package was considered to be a strong contender in the luxury coupe segment. Fuel economy figures of around 34.6 mpg combined were competitive for the time, and the engine proved to be relatively reliable.
Legacy
The M276 engine family, including the 3.5-liter variant found in the C350, has proven to be a durable and reliable powertrain. While preventative maintenance, such as regular oil changes and coolant flushes, is crucial, these engines are generally known for their longevity. On the used car market, the C350 BlueEFFICIENCY Coupe remains a desirable option for buyers seeking a stylish and well-equipped luxury coupe. Its combination of performance, comfort, and reliability makes it a compelling alternative to newer, more technologically advanced models. However, potential buyers should be aware of the potential for age-related issues, such as worn suspension components and electrical glitches, and should thoroughly inspect any vehicle before purchase.
