The Mercedes-Benz C 350 V6, produced from June 2005 to January 2007, was a performance-oriented variant of the W203 C-Class sedan, representing the facelifted version of the third-generation C-Class. Positioned as a step up from the C 230 Kompressor and C 280, the C 350 offered a naturally aspirated V6 engine, providing a more refined and powerful driving experience. It was a key offering in the North American market, where larger displacement engines were favored, and served as a competitor to BMW’s 330i and Audi’s A4 3.2.
| Brand | Mercedes-Benz |
| Model | C-Class |
| Generation | C-Class (W203, facelift 2004) |
| Type (Engine) | C 350 V6 (272 Hp) |
| Start of production | June, 2005 |
| End of production | January, 2007 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 13.7-14 l/100 km (17.2 – 16.8 US mpg) |
| Fuel consumption (extra urban) | 7-7.3 l/100 km (33.6 – 32.2 US mpg) |
| Fuel consumption (combined) | 9.5-9.8 l/100 km (24.8 – 24 US mpg) |
| CO2 emissions | 227-234 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6.4 sec |
| Acceleration 0 – 62 mph | 6.4 sec |
| Acceleration 0 – 60 mph | 6.1 sec |
| Maximum speed | 250 km/h (155.34 mph) – Electronically limited |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 5.4 kg/Hp |
| Weight-to-torque ratio | 4.2 kg/Nm |
| Power | 272 Hp @ 6000 rpm |
| Torque | 350 Nm @ 2400-5000 rpm (258.15 lb.-ft. @ 2400-5000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 272.960 |
| 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 | 10.7:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated |
| Valvetrain | DOHC |
| Engine oil capacity | 8 l (8.45 US qt | 7.04 UK qt) |
| Coolant capacity | 10 l (10.57 US qt | 8.8 UK qt) |
| Kerb Weight | 1480 kg (3262.84 lbs.) |
| Max. weight | 2030 kg (4475.38 lbs.) |
| Max load | 550 kg (1212.54 lbs.) |
| Trunk (boot) space | 455 l (16.07 cu. ft.) |
| Fuel tank capacity | 62 l (16.38 US gal | 13.64 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load (braked) | 1800 kg (3968.32 lbs.) |
| Permitted trailer load (unbraked) | 750 kg (1653.47 lbs.) |
| Length | 4526 mm (178.19 in.) |
| Width | 1728 mm (68.03 in.) |
| Width (with mirrors) | 1980 mm (77.95 in.) |
| Height | 1430 mm (56.3 in.) |
| Wheelbase | 2715 mm (106.89 in.) |
| Front track | 1493 mm (58.78 in.) |
| Rear track | 1464 mm (57.64 in.) |
| Front overhang | 755 mm (29.72 in.) |
| Rear overhang | 1056 mm (41.57 in.) |
| Drag coefficient (Cd) | 0.27 |
| Turning circle | 10.76 m (35.3 ft.) |
| Drivetrain | Rear wheel drive |
| Number of gears | 6 |
| Gearbox type | Manual transmission |
| Front suspension | Independent McPherson, Transverse stabilizer |
| Rear suspension | Independent multi-link, Transverse stabilizer |
| Front brakes | Ventilated discs |
| Rear brakes | Discs |
| Safety systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic |
| Tire size | 225/45 R 17 |
| Wheel rims size | 7.5 J x 17 H 2 |
Powertrain & Engine Architecture
The heart of the C 350 was the M272.960 3.5-liter naturally aspirated V6 engine. This engine was a significant departure from the supercharged engines (Kompressor) previously offered in the C-Class. The M272 featured all-aluminum construction, three valves per cylinder, and a dual overhead camshaft (DOHC) design. Its multi-port fuel injection system delivered fuel directly into the intake ports, optimizing combustion. The engine produced 272 horsepower at 6,000 rpm and 350 Nm (258 lb-ft) of torque between 2,400 and 5,000 rpm. The engine’s smooth power delivery and relatively high revving nature were hallmarks of the M272 series. The C 350 was typically paired with a 6-speed manual transmission, although a 7G-TRONIC automatic transmission was also available as an option. The 7G-TRONIC offered smoother shifts and improved fuel efficiency compared to older automatic transmissions.
Driving Characteristics
The C 350 V6 with the manual transmission provided a noticeably more engaging driving experience than the C 230 or C 280. The engine’s power band was broad, offering strong acceleration throughout the rev range. While not as brutally quick as some turbocharged competitors, the C 350’s linear power delivery made it predictable and enjoyable to drive. The 6-speed manual allowed for precise control, while the optional 7G-TRONIC automatic provided seamless gear changes. The rear-wheel-drive configuration contributed to a balanced chassis, offering good handling characteristics. Compared to the C 230 Kompressor, the C 350 felt more refined and less prone to torque steer. The C 280, while offering a similar level of refinement, lacked the outright power of the C 350.
Equipment & Trim Levels
The C 350 typically came standard with features such as leather upholstery, automatic climate control, power-adjustable front seats, and a premium sound system. Optional extras included a sunroof, navigation system, upgraded wheels, and a sport package that added features like sport seats and a sport suspension. Interior trim options ranged from wood veneers to aluminum accents. The C 350 was generally positioned as a well-equipped vehicle, offering a comfortable and luxurious interior. The availability of various option packages allowed buyers to customize the car to their preferences.
Chassis & Braking
The W203 C-Class featured an independent suspension system at all four wheels. The front suspension utilized a McPherson strut design, while the rear suspension employed a multi-link setup. This configuration provided a good balance between ride comfort and handling performance. The C 350 typically came equipped with ventilated disc brakes at the front and solid disc brakes at the rear. Anti-lock braking system (ABS) was standard. The suspension was tuned to provide a comfortable ride while still offering responsive handling. The C 350’s chassis was relatively lightweight, contributing to its agile handling characteristics.
Market Reception & Comparison
The C 350 V6 was generally well-received by automotive critics. It was praised for its smooth and powerful engine, refined interior, and balanced handling. However, some critics noted that its fuel economy was relatively poor compared to some of its competitors. Compared to the C 230 Kompressor, the C 350 offered significantly more power and a more refined driving experience, but at a higher price point. The C 280 offered a similar level of refinement, but lacked the C 350’s outright performance. In terms of reliability, the M272 engine proved to be generally robust, although some owners have reported issues with the balance shaft, which could lead to oil leaks.
Legacy
The M272 engine family, including the 3.5-liter variant found in the C 350, has proven to be a durable and reliable powertrain. While not without its potential issues (such as the aforementioned balance shaft problem), the engine is generally well-regarded by mechanics and enthusiasts. Today, the W203 C 350 V6 can be found on the used car market at relatively affordable prices. It represents a compelling option for buyers seeking a comfortable, well-equipped, and reasonably powerful German sedan. Its classic Mercedes-Benz styling and relatively simple mechanicals make it an attractive choice for those looking for a reliable and enjoyable driving experience.
