The Mercedes-Benz CLK 63 AMG, produced from 2006 to 2009 as part of the C209 facelift generation, represents the high-performance pinnacle of the CLK coupe and convertible range. Positioned as the flagship model, it offered a substantial increase in power and sporting capability compared to the naturally aspirated V6 and supercharged V6 variants. The CLK 63 AMG aimed to deliver a blend of grand touring comfort and exhilarating performance, appealing to buyers seeking a luxurious yet dynamic driving experience. It was a key competitor to the BMW 6 Series and Porsche 911 in the premium sports coupe segment.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | CLK |
| Generation | CLK (C209, facelift 2005) |
| Type | AMG CLK 63 (481 Hp) 7G-TRONIC |
| Start of production | 2006 |
| End of production | 2009 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 21.3 l/100 km (11 US mpg, 13.3 UK mpg, 4.7 km/l) |
| Fuel consumption (extra urban) | 10 l/100 km (23.5 US mpg, 28.2 UK mpg, 10 km/l) |
| Fuel consumption (combined) | 14.2 l/100 km (16.6 US mpg, 19.9 UK mpg, 7 km/l) |
| CO2 emissions | 338 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0-100 km/h | 4.6 sec |
| Acceleration 0-62 mph | 4.6 sec |
| Acceleration 0-60 mph | 4.4 sec |
| Maximum speed | 250 km/h (155.34 mph), Electronically limited |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 3.5 kg/Hp, 286.3 Hp/tonne |
| Weight-to-torque ratio | 2.7 kg/Nm, 375 Nm/tonne |
| Power | 481 Hp @ 6800 rpm |
| Power per litre | 77.5 Hp/l |
| Torque | 630 Nm @ 5000 rpm (464.66 lb.-ft. @ 5000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 156.982 |
| Engine displacement | 6208 cm3 (378.84 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 102.2 mm (4.02 in.) |
| Piston Stroke | 94.6 mm (3.72 in.) |
| Compression ratio | 11.3:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 8.8 l (9.3 US qt, 7.74 UK qt) |
| Kerb Weight | 1680 kg (3703.77 lbs.) |
| Max. weight | 2175 kg (4795.05 lbs.) |
| Max load | 495 kg (1091.29 lbs.) |
| Trunk (boot) space (minimum) | 435 l (15.36 cu. ft.) |
| Fuel tank capacity | 62 l (16.38 US gal, 13.64 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Length | 4652 mm (183.15 in.) |
| Width | 1740 mm (68.5 in.) |
| Width including mirrors | 1991 mm (78.39 in.) |
| Height | 1400 mm (55.12 in.) |
| Wheelbase | 2715 mm (106.89 in.) |
| Front track | 1495 mm (58.86 in.) |
| Rear track | 1474 mm (58.03 in.) |
| Drag coefficient (Cd) | 0.28 |
| Minimum turning circle | 10.76 m (35.3 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears | 7 |
| Gearbox type | Automatic transmission 7G-TRONIC |
| Front suspension | Independent type McPherson, Transverse stabilizer |
| Rear suspension | Independent multi-link suspension, Transverse stabilizer |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Front tires | 225/40 R 18 |
| Rear tires | 255/35 R 18 |
| Front wheel rims | 7.5 J x 18 |
| Rear wheel rims | 8.5 J x 18 |
INTRODUCTION
The CLK 63 AMG, launched in 2006, was a significant upgrade over its predecessors. Built on the C209 platform (which was itself a facelift of the W209 CLK), the 63 model distinguished itself with the adoption of the naturally aspirated 6.2-liter M156 V8 engine. This engine, a hallmark of AMG’s engineering prowess at the time, delivered a substantial power boost and a distinctive exhaust note. The CLK 63 was available as both a coupe and a convertible, offering buyers a choice between sporty elegance and open-air thrills. It represented the final iteration of the CLK before it was replaced by the C-Class Coupe and Convertible.
Powertrain & Engine Architecture
The heart of the CLK 63 AMG is the M156.982 6.2-liter naturally aspirated V8 engine. This engine is renowned for its robust construction and high-revving character. It features a cast aluminum block with silicon-aluminum alloy cylinder liners, a forged crankshaft, and lightweight connecting rods. The engine utilizes a three-valve per cylinder design (two intake, one exhaust) and a variable valve timing system on both intake and exhaust camshafts. Fuel is delivered via a multi-port fuel injection system. The M156 engine produces 481 horsepower at 6800 rpm and 464 lb-ft of torque at 5000 rpm.
Power is transmitted to the rear wheels through the 7G-TRONIC seven-speed automatic transmission. This transmission, developed by Mercedes-Benz, offers smooth and quick shifts, and features a manual shift mode for greater driver control. The 7G-TRONIC was specifically tuned to handle the high torque output of the M156 engine.
Driving Characteristics
The CLK 63 AMG delivers a thrilling driving experience characterized by its potent acceleration and responsive handling. The 6.2-liter V8 provides a broad torque curve, ensuring strong pull throughout the rev range. The 7G-TRONIC transmission complements the engine well, providing quick and seamless gear changes. While not as overtly track-focused as some of its rivals, the CLK 63 offers a satisfying balance between performance and comfort. The suspension, while firm, is well-damped, providing a relatively compliant ride for a high-performance coupe. The steering is precise and well-weighted, offering good feedback to the driver. Acceleration from 0 to 60 mph takes approximately 4.4 seconds, and the car is electronically limited to a top speed of 155 mph.
Equipment & Trim Levels
The CLK 63 AMG came generously equipped as standard. Interior features included leather upholstery, sport seats with adjustable lumbar support, automatic climate control, and a premium audio system. Exterior features included AMG-specific body styling, including a more aggressive front bumper, side skirts, and rear diffuser. Standard wheels were 18-inch AMG alloy wheels. Optional extras included a panoramic sunroof, upgraded leather upholstery, a navigation system, and a performance exhaust system. The interior trim could be customized with various wood or carbon fiber accents.
Chassis & Braking
The CLK 63 AMG features a fully independent suspension system. The front suspension utilizes a McPherson strut design with a transverse stabilizer bar, while the rear suspension employs a multi-link setup, also with a stabilizer bar. This suspension configuration provides a good balance between handling and ride comfort. Braking duties are handled by ventilated disc brakes on all four wheels, with large calipers and high-performance pads. The anti-lock braking system (ABS) and electronic stability program (ESP) are standard features, providing enhanced safety and control.
Market Reception & Comparison
The CLK 63 AMG was generally well-received by automotive critics. It was praised for its powerful engine, responsive handling, and luxurious interior. However, some critics noted that its fuel economy was relatively poor, and that its ride could be firm on rough roads. Compared to the CLK 500, the 63 offered a significant performance advantage, but at a higher price point. Compared to the CLK 350, the 63 was in a different league altogether, offering a much more engaging and exhilarating driving experience. The CLK 63 competed directly with the BMW 650i and Porsche 911, offering a compelling alternative with its blend of luxury and performance.
Legacy
The M156 engine, found in the CLK 63 AMG, is considered by many to be one of the greatest naturally aspirated engines ever produced. Its robust construction and high-revving character have made it a favorite among enthusiasts. While the CLK 63 AMG is no longer in production, it remains a desirable used car, particularly among those seeking a high-performance coupe with a distinctive character. The M156 engine is known for its reliability, although regular maintenance is essential to keep it in top condition. Today, well-maintained examples of the CLK 63 AMG command a premium in the used car market, reflecting its enduring appeal and the legendary status of its engine.
