The Mercedes-Benz CLK 230 Kompressor, produced from May 1998 to August 1999, was a key variant within the A208 CLK generation. Positioned as a mid-range offering, it bridged the gap between the entry-level CLK 200 Kompressor and the more potent CLK 320. This model combined a supercharged four-cylinder engine with Mercedes’ 5G-TRONIC automatic transmission, aiming to deliver a balance of performance and comfort in a stylish coupe or convertible body style. The A208 CLK series represented Mercedes-Benz’s attempt to recapture the spirit of the classic CLK models of the 1960s, offering a more sporting alternative to the larger, more conservative sedans of the era.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | CLK |
| Generation | CLK (A208) |
| Type (Engine) | CLK 230 Kompressor (193 Hp) 5G-TRONIC |
| Start of production | May, 1998 |
| End of production | August, 1999 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Cabriolet |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (economy) – urban (NEDC) | 15.1 l/100 km (15.6 US mpg, 18.7 UK mpg, 6.6 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 7.6 l/100 km (30.9 US mpg, 37.2 UK mpg, 13.2 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 10.3 l/100 km (22.8 US mpg, 27.4 UK mpg, 9.7 km/l) |
| CO2 emissions (NEDC) | 245 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 9.1 sec |
| Acceleration 0 – 62 mph | 9.1 sec |
| Acceleration 0 – 60 mph | 8.6 sec |
| Maximum speed | 227 km/h (141.05 mph) |
| Emission standard | Euro 3 |
| Weight-to-power ratio | 8 kg/Hp, 124.5 Hp/tonne |
| Weight-to-torque ratio | 5.5 kg/Nm, 180.6 Nm/tonne |
| Power | 193 Hp @ 5300 rpm |
| Power per litre | 84.1 Hp/l |
| Torque | 280 Nm @ 2500-4800 rpm (206.52 lb.-ft. @ 2500-4800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 111.975 |
| Engine displacement | 2295 cm3 (140.05 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 90.9 mm (3.58 in.) |
| Piston Stroke | 88.4 mm (3.48 in.) |
| Compression ratio | 8.8:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Supercharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 5.5 l (5.81 US qt | 4.84 UK qt) |
| Coolant | 8 l (8.45 US qt | 7.04 UK qt) |
| Kerb Weight | 1550 kg (3417.17 lbs.) |
| Max. weight | 2030 kg (4475.38 lbs.) |
| Max load | 480 kg (1058.22 lbs.) |
| Trunk (boot) space – minimum | 237 l (8.37 cu. ft.) |
| Trunk (boot) space – maximum | 350 l (12.36 cu. ft.) |
| Fuel tank capacity | 62 l (16.38 US gal | 13.64 UK gal) |
| Permitted trailer load with brakes (12%) | 1500 kg (3306.93 lbs.) |
| Permitted trailer load without brakes | 710 kg (1565.28 lbs.) |
| Length | 4567 mm (179.8 in.) |
| Width | 1722 mm (67.8 in.) |
| Width including mirrors | 1960 mm (77.17 in.) |
| Height | 1380 mm (54.33 in.) |
| Wheelbase | 2690 mm (105.91 in.) |
| Front track | 1505 mm (59.25 in.) |
| Rear (Back) track | 1474 mm (58.03 in.) |
| Front overhang | 860 mm (33.86 in.) |
| Rear overhang | 1017 mm (40.04 in.) |
| Minimum turning circle (turning diameter) | 10.7 m (35.1 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 G-TRONIC |
| Front suspension | Coil spring, Double wishbone, Transverse stabilizer |
| Rear suspension | Independent multi-link suspension, Transverse stabilizer, Coil spring |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Cone worm with recirculation balls |
| Power steering | Hydraulic Steering |
| Tires size | 205/55 R 16 |
| Wheel rims size | 7 J x 16 |
Powertrain & Engine Architecture
The heart of the CLK 230 Kompressor was the M111.975 2.3-liter inline-four cylinder engine. This engine was notable for its mechanically driven supercharger, a feature Mercedes-Benz termed “Kompressor.” Unlike turbochargers, the supercharger provided instant boost across the rev range, eliminating turbo lag and delivering a more linear power delivery. The engine utilized multi-port fuel injection and a double overhead camshaft (DOHC) valvetrain. The supercharger, an Eaton M62 unit, was intercooled to improve efficiency and reduce the temperature of the intake air. The 5G-TRONIC automatic transmission, a five-speed unit, was specifically tuned to complement the engine’s characteristics. It featured adaptive shift programming, adjusting shift points based on driving style and conditions.
Driving Characteristics
The CLK 230 Kompressor offered a noticeably more engaging driving experience than the naturally aspirated CLK 200 Kompressor. The supercharger provided ample low-end torque, making it responsive in city driving. While not a sports car, the 193 horsepower output and the well-tuned automatic transmission allowed for brisk acceleration – 0 to 60 mph in around 8.6 seconds. Compared to the CLK 320 with its larger V6 engine, the 230 Kompressor felt less powerful, but it offered a better balance of performance and fuel economy. The automatic transmission, while smooth, wasn’t as quick-shifting as some contemporary transmissions, but it contributed to the car’s overall comfort and ease of use.
Equipment & Trim Levels
The CLK 230 Kompressor typically came standard with features such as automatic climate control, power windows and locks, and a premium sound system. Leather upholstery was standard, and options included heated seats, a sunroof, and upgraded audio systems. The interior design was typical of Mercedes-Benz at the time – elegant and well-appointed, with a focus on comfort and refinement. Exterior options included various wheel designs and paint colors. The level of standard equipment positioned the CLK 230 Kompressor as a comfortable and well-equipped mid-range offering.
Chassis & Braking
The CLK 230 Kompressor utilized a coil spring and double wishbone suspension at the front, and an independent multi-link suspension at the rear. This setup provided a comfortable ride while maintaining good handling characteristics. Front brakes were ventilated discs, while rear brakes were solid discs. Anti-lock braking system (ABS) was standard. The suspension was tuned to prioritize comfort over outright sportiness, but it still offered a reasonably controlled and stable driving experience. Stabilizer bars were fitted front and rear to reduce body roll during cornering.
Market Reception & Comparison
The CLK 230 Kompressor was generally well-received by automotive critics. It was praised for its smooth engine, comfortable ride, and stylish design. However, some critics noted that the automatic transmission could feel a bit sluggish at times. Compared to the CLK 200 Kompressor, the 230 offered a significant performance upgrade. Compared to the CLK 320, it provided a more economical option without sacrificing too much in terms of refinement. Fuel economy was respectable for its class, averaging around 22.8 US mpg in combined driving.
Legacy
The M111 engine family, including the M111.975 found in the CLK 230 Kompressor, proved to be relatively reliable. With proper maintenance, these engines can last for many years. The 5G-TRONIC transmission is also generally durable, although it can be susceptible to issues if not serviced regularly. Today, the CLK 230 Kompressor represents an affordable entry point into Mercedes-Benz ownership. It offers a blend of style, comfort, and performance that continues to appeal to enthusiasts. While not as sought-after as some of the more powerful CLK variants, the 230 Kompressor remains a well-regarded and enjoyable classic car.
