The Mercedes-Benz CLS 63 AMG, specifically the C218 generation produced between March 2013 and September 2014, represents a high-performance iteration of the CLS four-door coupe. Positioned as the flagship variant within the C218 lineup, it offered a compelling blend of luxury, performance, and technology. This model distinguished itself with a potent 5.5-liter twin-turbocharged V8 engine paired with the AMG SPEEDSHIFT MCT seven-speed automatic transmission, targeting buyers seeking exhilarating performance without sacrificing the comfort and refinement expected from a Mercedes-Benz. It served as a direct competitor to vehicles like the Porsche Panamera and BMW 6 Series Gran Coupe.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | CLS |
| Generation | CLS coupe (C218) |
| Type (Engine) | AMG CLS 63 V8 (557 Hp) AMG SPEEDSHIFT MCT |
| Start of production | March, 2013 |
| End of production | September, 2014 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 4 |
| Fuel consumption (economy) – urban (NEDC) | 13.9 l/100 km (16.9 US mpg, 20.3 UK mpg, 7.2 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 7.6 l/100 km (30.9 US mpg, 37.2 UK mpg, 13.2 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 9.9 l/100 km (23.8 US mpg, 28.5 UK mpg, 10.1 km/l) |
| CO2 emissions (NEDC) | 231 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.2 sec |
| Acceleration 0 – 62 mph | 4.2 sec |
| Acceleration 0 – 60 mph | 4 sec |
| Maximum speed | 250 km/h (155.34 mph), Electronically limited |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 3.2 kg/Hp, 310.3 Hp/tonne |
| Weight-to-torque ratio | 2.5 kg/Nm, 401.1 Nm/tonne |
| Power | 557 Hp @ 5250-5750 rpm |
| Power per litre | 102 Hp/l |
| Torque | 720 Nm @ 1750-5000 rpm (531.04 lb.-ft. @ 1750-5000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 157.981 |
| Engine displacement | 5461 cm3 (333.25 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 98 mm (3.86 in.) |
| Piston Stroke | 90.5 mm (3.56 in.) |
| Compression ratio | 10:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | BiTurbo, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 8.5 l (8.98 US qt | 7.48 UK qt) |
| Kerb Weight | 1795 kg (3957.3 lbs.) |
| Max. weight | 2390 kg (5269.05 lbs.) |
| Max load | 595 kg (1311.75 lbs.) |
| Trunk (boot) space – minimum | 520 l (18.36 cu. ft.) |
| Fuel tank capacity | 66 l (17.44 US gal | 14.52 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Length | 4996 mm (196.69 in.) |
| Width | 1881 mm (74.06 in.) |
| Width including mirrors | 2075 mm (81.69 in.) |
| Height | 1411 mm (55.55 in.) |
| Wheelbase | 2874 mm (113.15 in.) |
| Front track | 1594 mm (62.76 in.) |
| Rear (Back) track | 1626 mm (64.02 in.) |
| Minimum turning circle | 11.27 m (36.98 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears and type of gearbox | 7 gears, automatic transmission AMG SPEEDSHIFT MCT |
| Front suspension | Coil spring, Independent multi-link suspension, Transverse stabilizer |
| Rear suspension | Independent multi-link suspension, Air suspension, Transverse stabilizer |
| Front brakes | Ventilated discs, 360×36 mm |
| Rear brakes | Ventilated discs, 360×26 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | Front wheel tires: 255/35 R19 Rear wheel tires: 285/30 R19 |
| Wheel rims size | Front wheel rims: 9J x 19 Rear wheel rims: 10J x 19 |
Powertrain & Engine Architecture
At the heart of the CLS 63 AMG lies the M157.981 5.5-liter V8 engine. This powerplant utilizes direct fuel injection and twin turbochargers to produce 557 horsepower and 720 Newton-meters (531 lb-ft) of torque. The engine features a dry sump lubrication system, a technology typically found in racing applications, to ensure consistent oil supply during aggressive driving maneuvers. The AMG SPEEDSHIFT MCT seven-speed automatic transmission is a key component of the powertrain. Unlike a traditional torque converter automatic, the MCT utilizes a wet multi-plate clutch instead, offering faster shift times and a more direct connection to the engine. This transmission also incorporates selectable drive modes, allowing the driver to tailor the shift points and responsiveness to their preferences.
Driving Characteristics
The CLS 63 AMG delivers a distinctly performance-oriented driving experience. The twin-turbo V8 provides immense power across the rev range, with peak torque available from a low 1750 rpm. This results in effortless acceleration and strong in-gear performance. The MCT transmission contributes to the car’s responsiveness, with quick and precise shifts. While not as overtly track-focused as some other AMG models, the CLS 63 offers a compelling balance between performance and comfort. Compared to the CLS 550 with its naturally aspirated V8, the 63 AMG provides a significantly more potent and engaging driving experience. It also surpasses the fuel efficiency of the lower-powered models, despite its higher output.
Equipment & Trim Levels
The CLS 63 AMG came standard with a comprehensive array of luxury and performance features. Interior appointments included premium leather upholstery, AMG sport seats, and carbon fiber trim. Standard technology included a high-resolution infotainment system with navigation, a premium sound system, and a suite of driver-assistance features such as adaptive cruise control and lane-keeping assist. Optional extras included a panoramic sunroof, upgraded leather options, and a rear-seat entertainment system. The exterior featured AMG-specific styling cues, including a unique front fascia, side skirts, and rear diffuser.
Chassis & Braking
The CLS 63 AMG features a sophisticated chassis designed to handle the engine’s substantial power. The suspension utilizes a multi-link setup at both the front and rear, with air suspension on the rear axle providing adjustable ride height and damping. Large ventilated disc brakes with multi-piston calipers provide ample stopping power. The braking system is further enhanced by ABS and electronic stability control. The car’s steering is precise and well-weighted, offering good feedback to the driver.
Market Reception & Comparison
The CLS 63 AMG was generally well-received by automotive critics, who praised its performance, luxury, and technology. Some reviewers noted that the ride could be firm, particularly in the sportiest drive modes. Compared to its rivals, the CLS 63 AMG offered a unique combination of style, performance, and practicality. Its fuel economy, while not exceptional, was reasonable for a high-performance vehicle of its size and capability. Reliability reports suggest that the M157 engine is generally robust, although preventative maintenance is crucial.
Legacy
The C218 CLS 63 AMG remains a desirable vehicle in the used car market. The M157 engine, while complex, has proven to be relatively durable with proper maintenance. Common issues include potential oil leaks and occasional turbocharger problems. However, these issues are typically addressable with regular servicing and preventative maintenance. The CLS 63 AMG represents a compelling option for buyers seeking a high-performance luxury coupe with a distinctive style and a powerful engine.
