The Mercedes-Benz CLS 55 AMG, produced from 2004 to 2006, represents the initial high-performance variant of the first-generation CLS-Class (C219). Positioned as a flagship coupe, it blended the elegance of a traditional sedan with the sporty profile of a coupe, creating a new niche – the four-door coupe. This model was a key component in establishing the CLS as a desirable, luxury performance vehicle, and showcased Mercedes-AMG’s engineering prowess. It was built on the W215 platform, sharing many components with the S-Class of the same era, but distinguished by its unique styling and performance enhancements.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | CLS |
| Generation | CLS coupe (C219) |
| Type | AMG CLS 55 V8 (476 Hp) 5G-TRONIC |
| Start of production | 2004 |
| End of production | 2006 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 4 |
| Fuel consumption (economy) – urban (NEDC) | 20.1 l/100 km (11.7 US mpg, 14.1 UK mpg, 5 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 9.8 l/100 km (24 US mpg, 28.8 UK mpg, 10.2 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 13.6 l/100 km (17.3 US mpg, 20.8 UK mpg, 7.4 km/l) |
| CO2 emissions (NEDC) | 326 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.7 sec |
| Acceleration 0 – 62 mph | 4.7 sec |
| Acceleration 0 – 60 mph | 4.5 sec |
| Maximum speed | 250 km/h (155.34 mph), Electronically limited |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 3.9 kg/Hp, 258 Hp/tonne |
| Weight-to-torque ratio | 2.6 kg/Nm, 379.4 Nm/tonne |
| Power | 476 Hp @ 6100 rpm |
| Power per litre | 87.5 Hp/l |
| Torque | 700 Nm @ 2650-4500 rpm (516.29 lb.-ft. @ 2650-4500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 113.990 |
| 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 | 9:1 |
| Number of valves per cylinder | 3 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Supercharger, Intercooler |
| Valvetrain | SOHC |
| Engine oil capacity | 8.5 l (8.98 US qt | 7.48 UK qt) |
| Coolant | 13.2 l (13.95 US qt | 11.61 UK qt) |
| Kerb Weight | 1845 kg (4067.53 lbs.) |
| Max. weight | 2385 kg (5258.02 lbs.) |
| Max load | 540 kg (1190.5 lbs.) |
| Trunk (boot) space – minimum | 450 l (15.89 cu. ft.) |
| Fuel tank capacity | 80 l (21.13 US gal | 17.6 UK gal) |
| Length | 4915 mm (193.5 in.) |
| Width | 1873 mm (73.74 in.) |
| Height | 1389 mm (54.69 in.) |
| Wheelbase | 2854 mm (112.36 in.) |
| Front track | 1599 mm (62.95 in.) |
| Rear (Back) track | 1583 mm (62.32 in.) |
| Drag coefficient (Cd) | 0.31 |
| Minimum turning circle (turning diameter) | 11.2 m (36.75 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 | Independent multi-link suspension, Transverse stabilizer, Air suspension |
| Rear suspension | Independent multi-link suspension, Air suspension, Transverse stabilizer |
| Front brakes | Ventilated discs, 360 mm |
| Rear brakes | Ventilated discs, 330 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | Front wheel tires: 245/40 R18; 255/35 R19 Rear wheel tires: 265/35 R18; 285/30 R19 |
| Wheel rims size | Front wheel rims: 8J x 18; 8.5J x 19 Rear wheel rims: 9J x 18; 9.5J x 19 |
Powertrain & Engine Architecture
The heart of the CLS 55 AMG is the M113.990 5.4-liter naturally aspirated V8 engine. This engine, a cornerstone of AMG’s early 2000s performance lineup, features a supercharger, providing substantial low-end torque. The engine utilizes a three-valve-per-cylinder design (two intake, one exhaust) and multi-port fuel injection. The supercharger, an IHI unit, is integrated into the intake manifold, delivering boost across a broad RPM range. The engine is longitudinally mounted at the front of the vehicle, driving the rear wheels. Paired with the engine is the 5G-TRONIC automatic transmission, a five-speed unit known for its smooth shifts and responsiveness. This transmission was specifically tuned by AMG for quicker gear changes and enhanced performance.
Driving Characteristics
The CLS 55 AMG delivers a distinctly powerful driving experience. The supercharged V8 provides immediate and substantial torque, resulting in brisk acceleration. The 0-60 mph sprint takes approximately 4.5 seconds, and the electronically limited top speed of 155 mph is easily achievable. The 5G-TRONIC transmission, while not as quick as modern multi-gear automatics, offers smooth and predictable shifts. Compared to later CLS variants with smaller, turbocharged engines, the CLS 55 AMG offers a more linear power delivery and a traditional V8 soundtrack. The car feels substantial and planted, thanks to its weight and well-tuned suspension. However, it lacks the agility of some lighter sports coupes.
Equipment & Trim Levels
The CLS 55 AMG came standard with a comprehensive list of luxury and performance features. Interior appointments included leather upholstery, wood trim, and power-adjustable heated front seats. Standard equipment also included a premium sound system, automatic climate control, and a sunroof. Optional extras included upgraded leather, a rear seat entertainment system, and various driver-assistance features. The exterior featured AMG-specific body styling, including unique front and rear bumpers, side skirts, and quad exhaust outlets. Wheels were typically 18 or 19-inch AMG alloys.
Chassis & Braking
The CLS 55 AMG utilizes a fully independent suspension system, with multi-link setups at both the front and rear. Air suspension was standard, providing a comfortable ride while also allowing for adjustable ride height. Large ventilated disc brakes were fitted at all four corners, providing ample stopping power. The front brakes measured 360mm in diameter, while the rear brakes were 330mm. Anti-lock brakes (ABS) were standard, as was electronic stability control. The steering system is a hydraulic rack-and-pinion setup, offering precise and responsive steering feel.
Market Reception & Comparison
The CLS 55 AMG was generally well-received by automotive critics. It was praised for its powerful engine, luxurious interior, and unique styling. However, some critics noted its relatively high fuel consumption and its substantial weight. Compared to other AMG models of the era, such as the SL55, the CLS 55 offered a more practical and versatile package. Compared to later CLS variants, such as the CLS 63 AMG with its turbocharged engine, the CLS 55 AMG offered a different character – a more traditional, naturally aspirated V8 experience. Fuel economy was a notable drawback, averaging around 17 mpg in combined driving.
Legacy
The CLS 55 AMG has become a sought-after vehicle among enthusiasts. The M113 engine is known for its durability and reliability, although maintenance costs can be significant due to its complexity. The 5G-TRONIC transmission is also generally reliable, but requires regular servicing. Today, well-maintained examples of the CLS 55 AMG command a premium in the used car market. It represents a unique chapter in Mercedes-AMG’s history, showcasing the brand’s commitment to performance and luxury in a distinctive four-door coupe package. Its robust construction and powerful engine continue to provide a rewarding driving experience for those seeking a classic AMG.
