The Mercedes-Benz C 350 V6, produced from June 2005 to January 2007, was a performance-oriented variant of the W203 C-Class sedan, specifically the facelifted model introduced in 2004. Positioned as a near-top-of-the-line offering, it slotted between the more fuel-efficient four-cylinder models and the high-performance AMG variants. This model represented a significant step up in power and refinement for the C-Class, appealing to buyers seeking a blend of luxury and spirited driving. It was primarily sold in European and North American markets, offering a compelling alternative to rivals like the BMW 3 Series and Audi A4.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | C-class |
| Generation | C-class (W203, facelift 2004) |
| Type (Engine) | C 350 V6 (272 Hp) 7G-TRONIC |
| Start of production | June, 2005 |
| End of production | January, 2007 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (economy) – urban (NEDC) | 13.9-14.2 l/100 km (16.9 – 16.6 US mpg, 20.3 – 19.9 UK mpg, 7.2 – 7 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 7.3-7.6 l/100 km (32.2 – 30.9 US mpg, 38.7 – 37.2 UK mpg, 13.7 – 13.2 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 9.7-10 l/100 km (24.2 – 23.5 US mpg, 29.1 – 28.2 UK mpg, 10.3 – 10 km/l) |
| CO2 emissions (NEDC) | 232-239 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 | 5.5 kg/Hp, 181.9 Hp/tonne |
| Weight-to-torque ratio | 4.3 kg/Nm, 234.1 Nm/tonne |
| Power | 272 Hp @ 6000 rpm |
| Power per litre | 77.8 Hp/l |
| 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 engine |
| Valvetrain | DOHC |
| Engine oil capacity | 8 l (8.45 US qt | 7.04 UK qt) |
| Coolant | 10 l (10.57 US qt | 8.8 UK qt) |
| Kerb Weight | 1495 kg (3295.91 lbs.) |
| Max. weight | 2030 kg (4475.38 lbs.) |
| Max load | 535 kg (1179.47 lbs.) |
| Trunk (boot) space – minimum | 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 with brakes (12%) | 1800 kg (3968.32 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Length | 4526 mm (178.19 in.) |
| Width | 1728 mm (68.03 in.) |
| Width including 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 (Back) 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 |
| Minimum turning circle (turning diameter) | 10.76 m (35.3 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 7 gears, automatic transmission |
| 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 | 225/45 R 17 |
| Wheel rims size | 7.5 J x 17 H 2 |
Powertrain & Engine Architecture
The C 350 V6 was powered by the M272.960 3.5-liter naturally aspirated V6 engine. This engine was a significant departure from the earlier inline-six engines used in the C-Class, offering improved smoothness and power delivery. The M272 featured all-aluminum construction, contributing to weight savings. It utilized a three-valve-per-cylinder design (two intake, one exhaust) and a multi-port fuel injection system. The engine produced 272 horsepower at 6,000 rpm and 350 Nm (258 lb-ft) of torque between 2,400 and 5,000 rpm. Paired with the engine was the 7G-TRONIC seven-speed automatic transmission, a sophisticated unit that offered smooth shifts and a wide range of gear ratios for both performance and fuel efficiency. This transmission allowed for both fully automatic operation and manual gear selection via steering wheel-mounted paddles or the gear selector.
Driving Characteristics
The C 350 V6 offered a noticeably more engaging driving experience than the base C-Class models. The 3.5-liter V6 provided ample power for confident acceleration and effortless highway cruising. The 7G-TRONIC transmission contributed to this, offering quick and precise shifts. While not as overtly sporty as the C55 AMG, the C 350 provided a good balance between comfort and performance. The gear ratios were tuned to prioritize both acceleration and fuel economy, with a relatively tall final drive. Compared to the six-speed manual transmission available on other C-Class models, the 7G-TRONIC offered smoother operation but slightly less direct engagement. The 0-60 mph time of around 6.1 seconds was competitive for its class.
Equipment & Trim Levels
The C 350 V6 typically came well-equipped, reflecting its position as a premium trim level. Standard features included leather upholstery, automatic climate control, a premium audio system, and power-adjustable front seats. Optional extras included a sunroof, navigation system, and upgraded wheels. Interior trim options typically included wood or aluminum accents. The exterior styling was largely similar to other W203 C-Class models, but the C 350 often featured subtle badging and larger wheels to distinguish it from lower trims.
Chassis & Braking
The C 350 V6 utilized the standard W203 C-Class chassis, featuring an independent McPherson strut front suspension and a multi-link independent rear suspension. Stabilizer bars were fitted to both axles to reduce body roll. Braking duties were handled by ventilated disc brakes at the front and solid disc brakes at the rear. ABS (Anti-lock Braking System) was standard. The suspension was tuned to provide a comfortable ride while maintaining reasonable handling characteristics. The increased weight of the V6 engine compared to the four-cylinder models necessitated slightly stiffer spring rates.
Market Reception & Comparison
The C 350 V6 was generally well-received by automotive critics. It was praised for its smooth and powerful engine, refined transmission, and comfortable ride. However, some reviewers noted that it lacked the outright sportiness of its rivals, such as the BMW 335i. Fuel economy was also a point of concern, as the V6 engine consumed significantly more fuel than the four-cylinder options. Compared to the C 230 Kompressor, the C 350 offered a substantial power increase but at the cost of increased fuel consumption and a higher purchase price. Against the C 55 AMG, it offered a more comfortable ride and better fuel economy, but lacked the AMG’s ultimate performance.
Legacy
The M272 engine family, including the 3.5-liter variant used in the C 350, proved to be relatively reliable. Common issues included occasional oil leaks and problems with the thermostat housing. The 7G-TRONIC transmission, while sophisticated, could sometimes exhibit issues with valve body failures. Today, the W203 C 350 V6 represents an affordable entry point into the Mercedes-Benz ownership experience. Well-maintained examples are still relatively common on the used car market, offering a blend of luxury, performance, and reliability. However, potential buyers should be aware of the potential maintenance costs associated with a higher-end European vehicle.
