The Mercedes-Benz CLK 55 AMG, produced from May 2005 to May 2006, represents the high-performance variant of the C209 CLK facelift. Positioned as the flagship coupe within the CLK range, it offered a substantial performance upgrade over the more common four and six-cylinder models. This model year saw a refinement of the C209 platform, incorporating styling and technological updates. The CLK 55 AMG aimed to deliver a blend of grand touring comfort and exhilarating performance, appealing to buyers seeking a powerful and luxurious coupe 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 55 V8 (367 Hp) 5G-TRONIC |
| Start of production | May, 2005 |
| End of production | May, 2006 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 17.4 l/100 km (13.5 US mpg, 16.2 UK mpg, 5.7 km/l) |
| Fuel consumption (extra urban) | 8.7 l/100 km (27 US mpg, 32.5 UK mpg, 11.5 km/l) |
| Fuel consumption (combined) | 12 l/100 km (19.6 US mpg, 23.5 UK mpg, 8.3 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.2 sec |
| Acceleration 0 – 62 mph | 5.2 sec |
| Acceleration 0 – 60 mph | 4.9 sec |
| Maximum speed | 250 km/h (155.34 mph) – Electronically limited |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 4.4 kg/Hp, 226.5 Hp/tonne |
| Weight-to-torque ratio | 3.2 kg/Nm, 314.8 Nm/tonne |
| Power | 367 Hp @ 5750 rpm |
| Power per litre | 67.5 Hp/l |
| Torque | 510 Nm @ 4000 rpm (376.16 lb.-ft. @ 4000 rpm) |
| Maximum engine speed | 6700 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 113.988 |
| Engine displacement | 5439 cm3 (331.91 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 97 mm (3.82 in.) |
| Piston Stroke | 92 mm (3.62 in.) |
| Compression ratio | 11:1 |
| Number of valves per cylinder | 3 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | SOHC |
| Engine oil capacity | 8.5 l (8.98 US qt | 7.48 UK qt) |
| Coolant capacity | 12 l (12.68 US qt | 10.56 UK qt) |
| Kerb Weight | 1620 kg (3571.49 lbs.) |
| Max. weight | 2100 kg (4629.71 lbs.) |
| Max load | 480 kg (1058.22 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 | 4643 mm (182.8 in.) |
| Width | 1740 mm (68.5 in.) |
| Width including mirrors | 1991 mm (78.39 in.) |
| Height | 1414 mm (55.67 in.) |
| Wheelbase | 2715 mm (106.89 in.) |
| Front track | 1495 mm (58.86 in.) |
| Rear track | 1474 mm (58.03 in.) |
| Minimum turning circle | 10.76 m (35.3 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears | 5 |
| Gearbox type | Automatic transmission 5G-TRONIC |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Independent multi-link spring suspension with 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 R18 |
| Rear tires | 255/35 R18 |
| Front wheel rims | 7.5J x 18 |
| Rear wheel rims | 8.5J x 18 |
Powertrain & Engine Architecture
The heart of the CLK 55 AMG is the M113.988 5.4-liter naturally aspirated V8 engine. This engine, a cornerstone of Mercedes-AMG’s performance lineup in the early 2000s, is renowned for its robust construction and smooth power delivery. It features a three-valve-per-cylinder (two intake, one exhaust) SOHC design and utilizes multi-port fuel injection. The engine’s block is constructed from aluminum alloy, contributing to a relatively lightweight design for its displacement. The 5G-TRONIC automatic transmission, a five-speed unit, was specifically tuned to handle the engine’s substantial torque output. This transmission offered smooth shifts and a responsive feel, although it lacks the efficiency of modern multi-gear transmissions. The engine’s longitudinal mounting and rear-wheel-drive configuration contribute to a classic sports car layout.
Driving Characteristics
The CLK 55 AMG delivers a distinctly engaging driving experience. The 367 horsepower and 376 lb-ft of torque provide strong acceleration, with 0-60 mph times consistently around 4.9 seconds. The 5G-TRONIC transmission, while not as quick-shifting as some contemporary dual-clutch systems, offers a good balance of comfort and performance. Compared to the base CLK models with four or six-cylinder engines, the CLK 55 AMG offers a dramatically different level of performance. The gear ratios are optimized for both acceleration and comfortable highway cruising. The engine’s torque curve is relatively flat, providing ample power throughout the rev range. However, the car’s weight (around 3571 lbs) is noticeable, and it doesn’t possess the razor-sharp handling of lighter sports cars.
Equipment & Trim Levels
The CLK 55 AMG came generously equipped as standard. Interior features included leather upholstery, power-adjustable heated seats, automatic climate control, and a premium sound system. Exterior features included AMG-specific body styling (including unique front and rear bumpers, side skirts, and a rear spoiler), 18-inch alloy wheels, and upgraded brakes. Optional extras included a sunroof, navigation system, and various interior trim options. The interior generally featured a dark wood trim, emphasizing the luxury aspect of the vehicle. The AMG steering wheel, with its flat bottom, was a distinctive feature.
Chassis & Braking
The CLK 55 AMG features an independent suspension system at all four corners. The front suspension utilizes a McPherson strut design, while the rear employs a multi-link setup. Both ends are equipped with coil springs and anti-roll bars to minimize body roll. Braking duties are handled by ventilated disc brakes at all four wheels, providing ample stopping power. The AMG-tuned suspension offered a firmer ride than the standard CLK models, enhancing handling but slightly compromising ride comfort. The car’s weight distribution is reasonably balanced, contributing to predictable handling characteristics.
Market Reception & Comparison
The CLK 55 AMG was generally well-received by automotive critics. It was praised for its powerful engine, comfortable interior, and overall refinement. However, some critics noted that its handling wasn’t as sharp as some of its competitors, such as the BMW 6 Series. Fuel economy was also a common criticism, with combined fuel consumption averaging around 19.6 US mpg. Compared to the CLK 320 or CLK 350, the CLK 55 AMG offered significantly more performance but at a higher price point and with increased running costs. The CLK 55 AMG offered a more luxurious and comfortable experience than the Porsche 911, but lacked the Porsche’s track-focused handling.
Legacy
The M113 engine in the CLK 55 AMG is known for its durability and reliability, provided it receives regular maintenance. The 5G-TRONIC transmission, while generally reliable, can require servicing as it ages. Today, the CLK 55 AMG represents an affordable entry point into the world of high-performance Mercedes-Benz vehicles. It’s a popular choice among enthusiasts seeking a stylish and powerful coupe with a classic V8 soundtrack. Parts availability is generally good, and the car’s relatively simple mechanical design makes it relatively easy to maintain. The CLK 55 AMG has established itself as a modern classic, appreciated for its blend of performance, luxury, and relative affordability.
