The Mercedes-Benz CLK 320 V6, produced between May 1998 and August 1999, represented a compelling blend of performance and luxury within the A208 CLK generation. Positioned as a mid-range offering, it slotted between the entry-level CLK 200 Kompressor and the higher-performance CLK 430. This variant was primarily aimed at buyers seeking a refined grand tourer experience with a naturally aspirated V6 engine and the convenience of an automatic transmission. The CLK A208 series itself was significant as Mercedes-Benz’s attempt to recapture the spirit of the classic SL roadsters, offering open-air enjoyment in the cabriolet body style alongside a more practical coupe.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | CLK |
| Generation | CLK (A208) |
| Type (Engine) | CLK 320 V6 (218 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) | 15.7 l/100 km (15 US mpg, 18 UK mpg, 6.4 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 8.2 l/100 km (28.7 US mpg, 34.4 UK mpg, 12.2 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 | 8.3 sec |
| Acceleration 0 – 62 mph | 8.3 sec |
| Acceleration 0 – 60 mph | 7.9 sec |
| Maximum speed | 236 km/h (146.64 mph) |
| Emission standard | Euro 3 |
| Weight-to-power ratio | 7.4 kg/Hp, 134.6 Hp/tonne |
| Weight-to-torque ratio | 5.2 kg/Nm, 191.4 Nm/tonne |
| Power | 218 Hp @ 5700 rpm |
| Power per litre | 68.1 Hp/l |
| Torque | 310 Nm @ 3000-4600 rpm (228.64 lb.-ft. @ 3000-4600 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 112.940 |
| 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 | 9 l (9.51 US qt, 7.92 UK qt) |
| Kerb Weight | 1620 kg (3571.49 lbs.) |
| Max. weight | 2070 kg (4563.57 lbs.) |
| Max load | 450 kg (992.08 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 | 745 kg (1642.44 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 |
| 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 CLK 320 V6 was powered by the M112.940 engine, a 3.2-liter naturally aspirated V6. This engine was a significant departure from earlier Mercedes-Benz inline-six designs, embracing a more modern V-configuration for improved smoothness and packaging. The M112 featured a silicon-aluminum alloy engine block, 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 310 Nm (228.64 lb-ft) of torque between 3000 and 4600 rpm. The engine was paired with Mercedes-Benz’s 5G-TRONIC automatic transmission, a five-speed unit known for its smooth shifting and adaptability. This transmission offered both fully automatic operation and a manual shift mode for greater driver control.
Driving Characteristics
The CLK 320 V6 Automatic offered a comfortable and refined driving experience. While not overtly sporty, the V6 engine provided ample power for relaxed cruising and confident overtaking. The 5G-TRONIC transmission was well-matched to the engine’s characteristics, providing smooth and seamless gear changes. Acceleration from 0 to 60 mph took approximately 7.9 seconds, and the car had a top speed of 146.64 mph. Compared to the CLK 200 Kompressor, the 320 offered significantly more power and torque, resulting in a more effortless driving experience. However, it lacked the sharper handling and more engaging feel of the CLK 430, which featured a more powerful V8 engine and a sportier suspension setup. The automatic transmission, while convenient, did result in a slight performance deficit compared to the available manual transmission options.
Equipment & Trim Levels
The CLK 320 V6 came standard with a generous array of features, reflecting its positioning as a mid-range luxury vehicle. Standard equipment typically included leather upholstery, automatic climate control, power-adjustable front seats, a premium sound system, and alloy wheels. Optional extras included a sunroof, heated seats, a navigation system, and upgraded interior trim materials. The Cabriolet version, in particular, benefited from a well-insulated soft top and a power-operated mechanism for raising and lowering the roof. Interior trim options ranged from wood veneers to carbon fiber accents, allowing buyers to personalize the cabin to their tastes.
Chassis & Braking
The CLK 320 V6 utilized a robust chassis with a double wishbone front suspension and an independent multi-link rear suspension. This setup provided a comfortable ride while maintaining good handling characteristics. The car 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 safety and stability during emergency braking maneuvers. The steering was a hydraulic power-assisted system, offering precise and responsive control.
Market Reception & Comparison
The CLK 320 V6 was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, and luxurious interior. However, some reviewers noted that the car lacked the sporting character of its rivals, such as the BMW 3 Series Convertible. Fuel economy was also a point of concern, with the V6 engine consuming a significant amount of fuel, particularly in urban driving conditions. Compared to the CLK 200 Kompressor, the 320 offered a more satisfying driving experience, but at a higher price point. The CLK 430, while more expensive, provided a noticeable performance upgrade and a more engaging driving experience.
Legacy
The M112 V6 engine proved to be a reliable and durable powerplant, and the CLK 320 V6 remains a sought-after classic today. While maintenance costs can be higher than those of more mainstream vehicles, the engine is generally considered to be robust and long-lasting. The 5G-TRONIC transmission is also known for its reliability, although regular fluid changes are essential to maintain its smooth operation. In the used car market, the CLK 320 V6 Cabriolet is particularly desirable, offering a stylish and comfortable open-air driving experience. Its blend of luxury, performance, and classic Mercedes-Benz styling ensures its continued appeal to enthusiasts and collectors.
