2003-2005 Mercedes-Benz CLK (A209) CLK 240 (170 Hp)

The Mercedes-Benz CLK 240, produced between March 2003 and May 2005, was a key variant within the A209 generation of the CLK-Class. Positioned as a mid-range offering in the lineup, it provided a balance between performance and affordability within the luxury coupe/convertible segment. The A209 CLK-Class represented a significant evolution over its predecessor (the C208), boasting a more refined interior, improved chassis dynamics, and updated engine technology. The CLK 240 specifically targeted buyers seeking a comfortable and stylish grand tourer with a naturally aspirated V6 engine.

Technical Specifications

Brand Mercedes-Benz
Model CLK
Generation CLK (A209)
Type (Engine) CLK 240 (170 Hp)
Start of production March, 2003
End of production May, 2005
Powertrain Architecture Internal Combustion engine
Body type Cabriolet
Seats 4
Doors 2
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) 7.9 l/100 km (29.8 US mpg, 35.8 UK mpg, 12.7 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 9.7 sec
Acceleration 0 – 62 mph 9.7 sec
Acceleration 0 – 60 mph 9.2 sec
Maximum speed 232 km/h (144.16 mph)
Emission standard Euro 4
Weight-to-power ratio 9.6 kg/Hp, 104.6 Hp/tonne
Weight-to-torque ratio 6.8 kg/Nm, 147.7 Nm/tonne
Power 170 Hp @ 5500 rpm
Power per litre 65.5 Hp/l
Torque 240 Nm @ 4500 rpm (177.01 lb.-ft. @ 4500 rpm)
Engine layout Front, Longitudinal
Engine Model/Code M 112.912
Engine displacement 2597 cm3 (158.48 cu. in.)
Number of cylinders 6
Engine configuration V-engine
Cylinder Bore 89.9 mm (3.54 in.)
Piston Stroke 68.2 mm (2.69 in.)
Compression ratio 10.5:1
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 1625 kg (3582.51 lbs.)
Max. weight 2155 kg (4750.96 lbs.)
Max load 530 kg (1168.45 lbs.)
Trunk (boot) space – minimum 276 l (9.75 cu. ft.)
Trunk (boot) space – maximum 390 l (13.77 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 750 kg (1653.47 lbs.)
Length 4638 mm (182.6 in.)
Width 1740 mm (68.5 in.)
Width including mirrors 1991 mm (78.39 in.)
Height 1413 mm (55.63 in.)
Wheelbase 2715 mm (106.89 in.)
Front track 1493 mm (58.78 in.)
Rear (Back) track 1474 mm (58.03 in.)
Front overhang 840 mm (33.07 in.)
Rear overhang 1083 mm (42.64 in.)
Drag coefficient (Cd) 0.30
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, 300×28 mm
Rear brakes Disc, 290×10 mm
Assisting systems ABS (Anti-lock braking system)
Steering type Steering rack and pinion
Power steering Hydraulic Steering
Tires size Front wheel tires: 205/55 R16 Rear wheel tires: 225/50 R16
Wheel rims size Front wheel rims: 7J x 16 Rear wheel rims: 8J x 16

Powertrain & Engine Architecture

The CLK 240 was powered by the M112.912, a 2.6-liter naturally aspirated V6 engine. This engine was part of Mercedes-Benz’s modular V6 and V8 engine family, known for its smooth operation and relatively simple design. The M112 featured a single overhead camshaft (SOHC) design per cylinder bank, three valves per cylinder (two intake, one exhaust), and a multi-port fuel injection system. The engine produced 170 horsepower at 5500 rpm and 240 Nm (177 lb-ft) of torque at 4500 rpm. The engine’s longitudinal mounting and rear-wheel drive configuration were typical for Mercedes-Benz vehicles of this era. The standard transmission was a 6-speed manual, although a 5-speed automatic transmission was also available, impacting acceleration and fuel economy.

Driving Characteristics

The CLK 240 with the manual transmission offered a reasonably engaging driving experience. While not overtly sporty, the V6 provided adequate power for comfortable cruising and occasional spirited driving. The 0-60 mph time of around 9.2 seconds was respectable for the period. The automatic transmission, while offering convenience, did slightly diminish acceleration and responsiveness. The suspension, tuned for comfort, provided a smooth ride, absorbing road imperfections effectively. Steering was precise but lacked significant feedback. Compared to the more powerful CLK 320 or the performance-oriented AMG variants, the CLK 240 prioritized refinement and fuel efficiency over outright speed.

Equipment & Trim Levels

The CLK 240 typically came standard with features such as automatic climate control, power windows and locks, a multi-function steering wheel, and a basic audio system. Upholstery was generally cloth, with leather options available as an upgrade. Common optional extras included a premium sound system, sunroof, heated seats, and parking sensors. The interior design was typical of Mercedes-Benz, emphasizing quality materials and a luxurious ambiance. Trim levels were relatively simple, with options primarily focused on adding convenience and comfort features.

Chassis & Braking

The CLK 240 utilized an independent suspension system, with McPherson struts at the front and a multi-link setup at the rear. This configuration provided a good balance between ride comfort and handling. Brakes were ventilated discs at the front and solid discs at the rear, equipped with ABS (Anti-lock Braking System) as standard. The chassis was designed to provide a stable and predictable driving experience, prioritizing safety and comfort over aggressive cornering. Stabilizer bars were fitted front and rear to reduce body roll.

Market Reception & Comparison

The CLK 240 was generally well-received by automotive critics as a comfortable and stylish grand tourer. However, some reviewers noted that the engine lacked the punch of its larger displacement siblings. Fuel economy was considered average for its class. Compared to the CLK 320, the 240 offered a more affordable entry point into the CLK range, but at the expense of performance. The 240 also offered a more refined experience than the diesel variants available in Europe. The automatic transmission was often criticized for being somewhat sluggish compared to the manual.

Legacy

The M112 engine family, including the 2.6-liter variant in the CLK 240, is generally considered reliable, although regular maintenance is crucial. Common issues include oil leaks and occasional problems with the electronic ignition system. Today, the CLK 240 represents an affordable entry point into Mercedes-Benz ownership. Well-maintained examples are sought after by enthusiasts who appreciate the classic Mercedes-Benz styling and comfortable driving experience. The availability of parts is generally good, making it a relatively easy car to maintain. However, as with any older vehicle, potential buyers should be aware of the possibility of age-related issues and ensure a thorough inspection before purchase.

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