The Mercedes-Benz CLS 63 S 4MATIC, produced between June 2013 and September 2014, represents the pinnacle of performance within the C218 CLS coupe generation. Positioned as the flagship variant, it combined the elegant four-door coupe styling of the CLS with the formidable power of Mercedes-AMG’s 5.5-liter biturbo V8 engine. This model aimed to deliver uncompromising performance and luxury, appealing to buyers seeking a high-performance vehicle with a distinctive aesthetic. It served as a direct competitor to vehicles like the Porsche Panamera and BMW 6 Series Gran Coupe, offering a unique blend of style, speed, and technology.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | CLS |
| Generation | CLS coupe (C218) |
| Type | AMG CLS 63 S V8 (585 Hp) 4MATIC AMG SPEEDSHIFT MCT |
| Start of production | June, 2013 |
| End of production | September, 2014 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 4 |
| Fuel consumption (urban) | 14.4 l/100 km (16.3 US mpg, 19.6 UK mpg, 6.9 km/l) |
| Fuel consumption (extra urban) | 8 l/100 km (29.4 US mpg, 35.3 UK mpg, 12.5 km/l) |
| Fuel consumption (combined) | 10.4 l/100 km (22.6 US mpg, 27.2 UK mpg, 9.6 km/l) |
| CO2 emissions | 243 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 3.6 sec |
| Acceleration 0 – 62 mph | 3.6 sec |
| Acceleration 0 – 60 mph | 3.4 sec |
| Maximum speed | 250 km/h (155.34 mph), Electronically limited |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 3.2 kg/Hp |
| Weight-to-torque ratio | 2.3 kg/Nm |
| Power | 585 Hp @ 5500 rpm |
| Power per litre | 107.1 Hp/l |
| Torque | 800 Nm @ 2000-4500 rpm (590.05 lb.-ft. @ 2000-4500 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 | 1870 kg (4122.64 lbs.) |
| Max. weight | 2415 kg (5324.16 lbs.) |
| Max load | 545 kg (1201.52 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 track | 1626 mm (64.02 in.) |
| Minimum turning circle | 11.75 m (38.55 ft.) |
| Drivetrain Architecture | All wheel drive (4×4) |
| Number of gears | 7 |
| Gearbox type | 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, 402×39 mm |
| Rear brakes | Ventilated discs, 360×32 mm |
Powertrain & Engine Architecture
At the heart of the CLS 63 S 4MATIC lies the M157.981 5.5-liter V8 engine. This engine utilizes direct fuel injection and twin turbochargers to produce 585 horsepower and 800 Nm (590 lb-ft) of torque. The engine’s architecture features a hot-side-inside configuration for the turbochargers, placing them within the V of the engine to reduce exhaust path length and improve responsiveness. The cylinder heads incorporate four valves per cylinder and a dual overhead camshaft (DOHC) design. The AMG SPEEDSHIFT MCT 7-speed automatic transmission, a sophisticated unit employing a wet multi-plate clutch instead of a traditional torque converter, delivers rapid and precise gear changes. This transmission is tuned for performance, offering various driving modes including Comfort, Sport, Sport Plus, and Manual, each altering shift points and responsiveness.
Driving Characteristics
The CLS 63 S 4MATIC delivers exhilarating acceleration, achieving 0-60 mph in approximately 3.4 seconds. The 4MATIC all-wheel-drive system provides exceptional traction, particularly in adverse weather conditions. The AMG SPEEDSHIFT MCT transmission contributes to a dynamic driving experience, with quick and decisive shifts. While the engine provides abundant power across the rev range, the peak torque is readily available from 2000 rpm, resulting in strong mid-range acceleration. Compared to the standard CLS 63, the ‘S’ model offers a more aggressive throttle response and a slightly firmer suspension setup. The air suspension in the rear contributes to a comfortable ride, even with the performance-oriented tuning.
Equipment & Trim Levels
The CLS 63 S 4MATIC 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 large infotainment screen, navigation system, premium sound system, and a suite of driver-assistance features such as blind-spot monitoring and lane-keeping assist. Optional extras included a panoramic sunroof, upgraded leather packages, and a head-up display. The ‘S’ model typically included features that were optional on the base CLS 63, making it the more comprehensively equipped variant.
Chassis & Braking
The CLS 63 S 4MATIC features a sophisticated chassis designed to handle the engine’s substantial power. The front suspension utilizes a multi-link setup with coil springs and a transverse stabilizer bar, while the rear suspension employs an independent multi-link design with air suspension and a transverse stabilizer bar. This combination provides a balance of comfort and handling precision. The braking system consists of ventilated discs on all four wheels, with larger rotors and calipers on the front axle. AMG-branded calipers provide strong and consistent stopping power. The electronic stability program (ESP) is tuned to allow for a degree of controlled oversteer, enhancing the driving experience for skilled drivers.
Market Reception & Comparison
The CLS 63 S 4MATIC was generally well-received by automotive critics, who praised its performance, luxurious interior, and distinctive styling. However, some reviewers noted the relatively high fuel consumption and the firm ride quality. Compared to the standard CLS 63, the ‘S’ model offered a noticeable performance upgrade and a more exclusive feel. Against competitors like the Porsche Panamera and BMW 6 Series Gran Coupe, the CLS 63 S 4MATIC stood out with its unique blend of coupe-like styling and AMG performance. The 4MATIC all-wheel-drive system provided an advantage in all-weather conditions, while the AMG SPEEDSHIFT MCT transmission offered a more engaging driving experience than some of its rivals.
Legacy
The M157 engine, while powerful, has demonstrated a susceptibility to certain issues over time, including potential oil leaks and issues with the valve guides. However, with proper maintenance, these engines can remain reliable. The AMG SPEEDSHIFT MCT transmission has also proven to be generally durable, although regular fluid changes are essential. Today, the CLS 63 S 4MATIC remains a desirable vehicle in the used car market, appealing to enthusiasts seeking a high-performance luxury coupe. Its combination of power, style, and technology continues to make it a compelling option, though potential buyers should be aware of the potential maintenance costs associated with a high-performance AMG vehicle.
