The Mercedes-Benz C-Class Sport Coupe (CL203) C 320 V6 Automatic, 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 mid-range offering in the Sport Coupe lineup, it catered to buyers seeking a more engaging driving experience than the base models, without the outright performance focus of the C32 AMG. This three-door coupe variant aimed to attract a younger demographic, emphasizing a sporty aesthetic and a more dynamic driving character compared to the traditional C-Class sedan.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | C-class |
| Generation | C-class Sport Coupe (CL203) |
| Type (Engine) | C 320 V6 (218 Hp) Automatic |
| 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) | 15.6 l/100 km (15.1 US mpg, 18.1 UK mpg, 6.4 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 7.7 l/100 km (30.5 US mpg, 36.7 UK mpg, 13 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 10.6 l/100 km (22.2 US mpg, 26.6 UK mpg, 9.4 km/l) |
| CO2 emissions (NEDC) | 254 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 7.8 sec |
| Acceleration 0 – 62 mph | 7.8 sec |
| Acceleration 0 – 60 mph | 7.4 sec |
| Maximum speed | 245 km/h (152.24 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 | 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 Sport Coupe was the M112.946 3.2-liter V6 engine. This naturally aspirated powerplant featured a 60-degree V-angle and utilized a single overhead camshaft (SOHC) design per cylinder bank. The engine employed 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. The 3.2L V6 produced 218 horsepower at 5700 rpm and 308 Nm (227 lb-ft) of torque between 3000 and 4800 rpm. This power was channeled to the rear wheels through a five-speed automatic transmission (typically the 722.6). This transmission was selected for its smooth shifting characteristics and suitability for grand touring. While not the sportiest transmission available, it provided a comfortable and refined driving experience.
Driving Characteristics
The C 320 V6 Automatic offered a balanced driving experience. While not as overtly sporty as the manual transmission variants or the C32 AMG, it provided ample power for everyday driving and confident highway cruising. The automatic transmission, while smooth, did result in some power loss compared to the six-speed manual. Acceleration from 0 to 60 mph took approximately 7.4 seconds, and the car had a top speed of 152 mph. The gear ratios were tuned for a blend of performance and fuel efficiency, with a focus on providing smooth and predictable power delivery. The rear-wheel-drive configuration contributed to a balanced chassis and engaging handling, although it lacked the all-weather capability of all-wheel-drive systems found in some competitors.
Equipment & Trim Levels
The C 320 Sport Coupe came standard with a respectable array of features, including automatic climate control, power windows and locks, a multi-function steering wheel, and a premium audio system. Interior upholstery typically consisted of a combination of cloth and leatherette, with full leather options available as an upgrade. The dashboard featured a sporty design with aluminum trim accents. Optional extras included a sunroof, heated seats, a navigation system, and upgraded audio components. The “Sport” designation meant it also included sport seats and a sport-tuned suspension compared to the standard C-Class coupe.
Chassis & Braking
The CL203 Sport Coupe utilized an independent McPherson strut suspension at the front and an independent multi-link suspension at the rear. This setup provided a good balance of ride comfort and handling precision. Stabilizer bars were fitted to both axles to reduce body roll during cornering. Braking duties were handled by ventilated discs at the front and solid discs at the rear, equipped with ABS (Anti-lock Braking System). The suspension was tuned to be slightly firmer than the standard C-Class, providing a more engaging driving experience.
Market Reception & Comparison
The C 320 V6 Automatic was generally well-received by automotive critics. It was praised for its smooth engine, comfortable ride, and stylish design. However, some reviewers noted that the automatic transmission dulled the driving experience compared to the manual version. Compared to the C230 Kompressor, the C 320 offered significantly more power and torque, but at a higher price point. The C32 AMG, while offering substantially more performance, was considerably more expensive and catered to a different segment of the market. Fuel economy was reasonable for a V6 engine of this size, averaging around 22 mpg in combined driving.
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 five-speed automatic transmission is also known for its robustness. Today, the C 320 Sport Coupe is becoming increasingly sought after by enthusiasts as a stylish and affordable entry point into the Mercedes-Benz world. While not a high-performance icon, it represents a well-engineered and enjoyable driving experience, and well-maintained examples continue to hold their value in the used car market.
