The Mercedes-Benz C-Class (W203) C 320 V6 4MATIC was a performance-oriented variant of the second-generation C-Class, produced between August 2002 and March 2004. Positioned as a step up from the C 240 and C 280 models, the C 320 4MATIC offered a significant increase in power and all-wheel-drive capability, appealing to buyers seeking a more engaging driving experience and enhanced all-weather traction. It represented a mid-cycle refresh of the W203 platform, incorporating updated styling and technology alongside the new engine option. This model aimed to bridge the gap between the more accessible four-cylinder models and the high-performance AMG variants.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | C-class |
| Generation | C-class (W203) |
| Type (Engine) | C 320 V6 (218 Hp) 4MATIC |
| Start of production | August, 2002 |
| End of production | March, 2004 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (economy) – urban (NEDC) | 16.1 l/100 km (14.6 US mpg, 17.5 UK mpg, 6.2 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 8.3 l/100 km (28.3 US mpg, 34 UK mpg, 12 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 11.3 l/100 km (20.8 US mpg, 25 UK mpg, 8.8 km/l) |
| CO2 emissions (NEDC) | 269 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 8 sec |
| Acceleration 0 – 62 mph | 8 sec |
| Acceleration 0 – 60 mph | 7.6 sec |
| Maximum speed | 245 km/h (152.24 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 7.2 kg/Hp, 138.4 Hp/tonne |
| Weight-to-torque ratio | 5.1 kg/Nm, 195.6 Nm/tonne |
| Power | 218 Hp @ 5700 rpm |
| Power per litre | 68.1 Hp/l |
| Torque | 308 Nm @ 3000-4800 rpm (227.17 lb.-ft. @ 3000-4800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 112.953 |
| Engine displacement | 3199 cm3 (195.21 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 89.9 mm (3.54 in.) |
| Piston Stroke | 84 mm (3.31 in.) |
| Compression ratio | 10:1 |
| Number of valves per cylinder | 3 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | SOHC |
| Engine oil capacity | 7.5 l (7.93 US qt | 6.6 UK qt) |
| Coolant | 10 l (10.57 US qt | 8.8 UK qt) |
| Kerb Weight | 1575 kg (3472.28 lbs.) |
| Max. weight | 2130 kg (4695.85 lbs.) |
| Max load | 555 kg (1223.57 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%) | 1500 kg (3306.93 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Length | 4541 mm (178.78 in.) |
| Width | 1728 mm (68.03 in.) |
| Width including mirrors | 1980 mm (77.95 in.) |
| Height | 1422 mm (55.98 in.) |
| Wheelbase | 2715 mm (106.89 in.) |
| Front track | 1493 mm (58.78 in.) |
| Rear (Back) track | 1464 mm (57.64 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 permanently the four wheels of the vehicle. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 5 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 | 205/55 R 16 91 W |
| Wheel rims size | 7 J x 16 H 2 |
Powertrain & Engine Architecture
The heart of the C 320 4MATIC was the M112.953 3.2-liter naturally aspirated V6 engine. This engine was a significant upgrade from the inline-six engines previously offered in the C-Class. The M112 featured all-aluminum construction, three valves per cylinder (two intake, one exhaust), and a single overhead camshaft (SOHC) design. Fuel delivery was handled by a multi-port fuel injection system, providing precise fuel metering for optimal combustion. The engine produced 218 horsepower at 5700 rpm and 308 Nm (227 lb-ft) of torque between 3000 and 4800 rpm. The engine’s longitudinal mounting allowed for a more balanced weight distribution. Paired with the engine was a five-speed automatic transmission (722.6), known for its smooth shifting characteristics. This transmission was specifically tuned to complement the V6’s power delivery and the all-wheel-drive system.
Driving Characteristics
The C 320 4MATIC offered a noticeably more refined and capable driving experience compared to the four-cylinder C-Class models. The V6 engine provided ample power for both city driving and highway cruising, with the automatic transmission offering seamless gear changes. While not a sports car, the C 320 4MATIC delivered brisk acceleration – 0 to 60 mph in around 7.6 seconds – and a comfortable ride. The 4MATIC all-wheel-drive system significantly enhanced traction, particularly in inclement weather conditions. Compared to the rear-wheel-drive C 240 or C 280, the C 320 4MATIC felt more planted and secure, inspiring confidence in various driving scenarios. The automatic transmission, while smooth, did result in a slight reduction in fuel economy compared to the available manual transmission options in other C-Class trims.
Equipment & Trim Levels
The C 320 4MATIC typically came well-equipped as standard. Interior features included leather upholstery, power-adjustable front seats, automatic climate control, and a premium audio system. Exterior features included alloy wheels, fog lights, and a sunroof. Optional extras included navigation system, upgraded audio options, and a sport package that added a sport suspension and exterior styling enhancements. The interior trim was generally focused on luxury and comfort, with wood or aluminum accents available. The overall aesthetic aimed for a sophisticated and understated elegance, typical of Mercedes-Benz.
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 employed a multi-link setup. Both ends were equipped with a transverse stabilizer bar to reduce body roll during cornering. The C 320 4MATIC was equipped with ventilated disc brakes at the front and solid disc brakes at the rear, providing adequate stopping power for its weight and performance. Anti-lock braking system (ABS) was standard, enhancing braking safety. The suspension tuning was geared towards comfort, but the C 320 4MATIC offered a reasonably controlled and stable ride.
Market Reception & Comparison
The C 320 4MATIC was generally well-received by automotive critics. It was praised for its smooth and powerful engine, comfortable ride, and all-weather capability. However, some reviewers noted that the automatic transmission could feel slightly sluggish at times, and the fuel economy was not particularly impressive. Compared to the C 240 and C 280, the C 320 4MATIC offered a significant performance upgrade, but at a higher price point. It provided a compelling alternative to other luxury sedans in its class, such as the BMW 3 Series and Audi A4. Reliability was generally good, although preventative maintenance was crucial, as with any German luxury vehicle.
Legacy
The M112 V6 engine proved to be a reliable and durable powerplant, and many C 320 4MATIC models remain on the road today. While not as sought-after as the AMG variants, the C 320 4MATIC offers a good balance of performance, luxury, and practicality. In the used car market, these models are often appreciated for their relatively affordable price point and the peace of mind provided by the 4MATIC all-wheel-drive system. Common maintenance items include checking for oil leaks, maintaining the cooling system, and addressing any issues with the electronic components. Overall, the W203 C 320 4MATIC represents a solid and well-engineered luxury sedan that continues to provide enjoyable driving experience for its owners.
