The Mercedes-Benz C-Class Sport Coupe (CL203) C 320 V6, produced from September 2002 to March 2004, represented a compelling blend of performance and style within the second-generation C-Class (W203) range. Positioned as a more sporting alternative to the traditional sedan, the CL203 offered a three-door coupe body style aimed at a younger, more enthusiastic driver. The C 320 V6 variant, equipped with a 3.2-liter naturally aspirated V6 engine, served as a mid-range offering, bridging the gap between the entry-level C 230 Kompressor and the high-performance C 32 AMG. This model aimed to deliver a refined driving experience with a noticeable step up in power compared to the four-cylinder options.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | C-class |
| Generation | C-class Sport Coupe (CL203) |
| Type (Engine) | C 320 V6 (218 Hp) |
| Start of production | September, 2002 |
| End of production | March, 2004 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 3 |
| Fuel consumption (economy) – urban (NEDC) | 16.3 l/100 km (14.4 US mpg, 17.3 UK mpg, 6.1 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 7.8 l/100 km (30.2 US mpg, 36.2 UK mpg, 12.8 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 10.9 l/100 km (21.6 US mpg, 25.9 UK mpg, 9.2 km/l) |
| CO2 emissions (NEDC) | 262 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 7.7 sec |
| Acceleration 0 – 62 mph | 7.7 sec |
| Acceleration 0 – 60 mph | 7.3 sec |
| Maximum speed | 248 km/h (154.1 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 6.7 kg/Hp, 150.3 Hp/tonne |
| Weight-to-torque ratio | 4.7 kg/Nm, 212.4 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 112.946 |
| 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 | 8 l (8.45 US qt | 7.04 UK qt) |
| Coolant | 10.5 l (11.1 US qt | 9.24 UK qt) |
| Kerb Weight | 1450 kg (3196.7 lbs.) |
| Max. weight | 1980 kg (4365.15 lbs.) |
| Max load | 530 kg (1168.45 lbs.) |
| Trunk (boot) space – minimum | 310 l (10.95 cu. ft.) |
| Trunk (boot) space – maximum | 1100 l (38.85 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 | 4343 mm (170.98 in.) |
| Width | 1728 mm (68.03 in.) |
| Width including mirrors | 1960 mm (77.17 in.) |
| Height | 1406 mm (55.35 in.) |
| Wheelbase | 2715 mm (106.89 in.) |
| Front track | 1493 mm (58.78 in.) |
| Rear (Back) track | 1464 mm (57.64 in.) |
| Front overhang | 788 mm (31.02 in.) |
| Rear overhang | 840 mm (33.07 in.) |
| Drag coefficient (Cd) | 0.29 |
| 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 | 6 gears, manual 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 V6 is the M112.946 engine, a 3.2-liter naturally aspirated V6. This engine, a cornerstone of Mercedes-Benz’s mid-size offerings in the early 2000s, features a 60-degree V-angle and utilizes a single overhead camshaft (SOHC) design per cylinder bank. The engine employs multi-port fuel injection, delivering fuel directly into the intake ports. The M112 engine family was known for its smooth operation and relatively high specific output for a naturally aspirated engine. The C 320 V6 was typically paired with a 6-speed manual transmission, although a 5-speed automatic transmission was also available. The automatic transmission offered convenience but slightly impacted acceleration and fuel economy compared to the manual.
Driving Characteristics
The C 320 V6 offered a noticeably more engaging driving experience than the base C 230 Kompressor. With 218 horsepower and 308 Nm (227 lb-ft) of torque, the C 320 V6 provided ample power for both everyday driving and spirited performance. Acceleration from 0 to 60 mph took approximately 7.3-7.7 seconds, making it competitive with other coupes in its class. The rear-wheel-drive configuration contributed to a balanced feel, while the independent suspension provided a comfortable yet controlled ride. The 6-speed manual transmission allowed for precise gear selection and maximized engine performance, while the automatic, though smooth, felt somewhat less responsive.
Equipment & Trim Levels
The C 320 V6 Sport Coupe typically came well-equipped, reflecting its position as a mid-range offering. Standard features included automatic climate control, power windows and locks, a multi-function steering wheel, and a premium audio system. Interior upholstery was typically a combination of cloth and leatherette, with optional full leather available. Common optional extras included a sunroof, heated seats, and upgraded alloy wheels. The Sport Coupe trim also featured unique styling cues, such as a more aggressive front bumper and side skirts, differentiating it from the standard C-Class sedan.
Chassis & Braking
The CL203 Sport Coupe utilized a McPherson strut front suspension and a multi-link independent rear suspension. This setup provided a good balance between ride comfort and handling precision. The C 320 V6 was equipped with ventilated disc brakes at the front and solid disc brakes at the rear. Anti-lock Braking System (ABS) was standard, enhancing braking performance and stability. The chassis was reinforced compared to the standard C-Class sedan to improve rigidity and handling, contributing to a more engaging driving experience.
Market Reception & Comparison
The C 320 V6 Sport Coupe was generally well-received by automotive critics. It was praised for its smooth engine, comfortable ride, and sporty handling. However, some reviewers noted that the interior, while well-built, lacked the cutting-edge design of some competitors. Compared to the C 230 Kompressor, the C 320 V6 offered a significant performance upgrade, but at a higher price point. Against the higher-performance C 32 AMG, it offered a more refined and comfortable driving experience, albeit with less outright speed. Fuel economy was reasonable for a V6 engine of this size, averaging around 21.6 US mpg combined.
Legacy
The M112 engine family, including the 3.2-liter V6 found in the C 320, is generally considered to be a reliable and durable powerplant. With proper maintenance, these engines can accumulate high mileage without major issues. The CL203 Sport Coupe, while not as common as the sedan, has developed a following among enthusiasts who appreciate its sporty styling and engaging driving dynamics. Today, well-maintained examples of the C 320 V6 Sport Coupe are sought after by collectors and enthusiasts looking for a classic Mercedes-Benz coupe that offers a blend of performance, comfort, and style.
