The Mercedes-Benz CLS 63 AMG has long been synonymous with breathtaking performance and sophisticated luxury. For the 2014 model year, Mercedes-AMG elevated this iconic four-door coupe to new heights with the introduction of the Mercedes CLS 63 AMG S-Model. This iteration not only refines the existing model but injects an unprecedented level of power and handling prowess, specifically designed to thrill driving enthusiasts.
At the heart of the CLS 63 AMG S-Model lies the potent AMG 5.5-liter V8 biturbo engine, a masterpiece of engineering renowned for its exceptional blend of high output and remarkable efficiency. In the S-Model configuration, this powerhouse churns out an impressive 577 horsepower and a colossal 590 lb.-ft. of torque. This substantial increase in power over the standard CLS 63 AMG is a testament to AMG’s relentless pursuit of performance excellence. Mercedes-Benz AMG’s commitment extends beyond just raw power; they have also integrated an AMG-engineered version of their all-wheel-drive system, 4MATIC, into this high-performance coupe. This system is meticulously tuned for sporty driving, offering a level of grip and control previously unattainable in this segment, ensuring that all that power translates into blistering on-road performance.
Ola Källenius, CEO of Mercedes-AMG GmbH, aptly stated, “The S-Models in particular represent the most attractive proposition in the segment. With its superlative power and torque ratings and the new performance-oriented AMG 4MATIC all-wheel drive, the CLS 63 AMG is without parallel.” This statement underscores the unique position of the S-Model within the competitive landscape, highlighting its superior capabilities and exclusivity.
| CLS 63 AMG 4MATIC 4-door Coupe | CLS 63 AMG S-Model 4MATIC 4-door Coupe | |
|---|---|---|
| Displacement | 5.5-liter | 5.5-liter |
| Rated power output | 550 hp at 5,250 – 5,750 rpm | 577 hp at 5,500 rpm |
| Peak torque | 531 lb.-ft. at 1,750 – 5,000 rpm | 590 lb.-ft. at 2,000 – 4,500 rpm |
| Acceleration 0-60 mph (prelim) | 3.7 seconds | 3.6 seconds |
| Top speed (electronically limited) | 155 mph | 186 mph |
Performance Prowess: Acceleration and Top Speed
The numbers speak for themselves. The Mercedes CLS 63 AMG S-Model achieves a blistering 0-60 mph acceleration time of just 3.6 seconds, firmly placing it at the pinnacle of its class. This astonishing acceleration is not solely due to the increased horsepower but is also significantly enhanced by the performance-oriented 4MATIC all-wheel drive system. This intelligent system features a rear-biased power distribution of 33:67, optimizing traction during hard launches and minimizing wheel slip. Furthermore, the electronic limiter on the S-Model is raised to 186 mph, allowing drivers to fully experience its high-speed capabilities where regulations permit.
Alt text: Close-up of the powerful AMG 5.5-liter V8 biturbo engine in the Mercedes CLS 63 AMG S-Model, showcasing its engineering excellence.
Engine Enhancements and Efficiency
The enhanced performance of the Mercedes CLS 63 AMG S-Model stems from meticulous refinements to the AMG 5.5-liter V8 biturbo engine. Compared to the previous AMG Performance Package, the S-Model gains 27 horsepower thanks to adapted engine electronics and an increased turbo boost pressure, now reaching 1.0 bar, up from 0.9 bar. Even the standard CLS 63 AMG model benefits from this development, boasting a 32 horsepower increase over its predecessor. Remarkably, despite these significant power gains, all models in the range maintain impressive fuel efficiency and low emissions, reinforcing the AMG 5.5-liter V8 biturbo engine’s position as the most efficient high-performance V8 in production.
AMG SPEEDSHIFT MCT 7-Speed Sports Transmission
Complementing the potent engine is the AMG SPEEDSHIFT MCT 7-Speed sports transmission, a crucial component in delivering the CLS 63 AMG S-Model‘s exceptional driving dynamics. This transmission offers a range of customizable settings through four drive programs: “C” (Controlled Efficiency), “S” (Sport), “S+” (Sport plus), and “M” (Manual).
In “C” mode, the focus is on smooth, comfortable gear changes and fuel efficiency. The ECO start/stop feature activates, shutting off the V8 engine at idle, and the car typically starts in second gear for smoother launches in everyday driving. Switching to “S”, “S+”, or “M” modes transforms the driving experience, sharpening engine and transmission response. The ECO start/stop function is deactivated, and gearshifts become noticeably quicker and more aggressive. Adding to the sporty character, momentary suppression of ignition and injection during full-throttle upshifts results in rapid gear changes accompanied by an exhilarating sound. Standard features also include automatic rev-matching on downshifts and RACE START, enabling optimal acceleration from a standstill.
Alt text: Illustration of the AMG SPEEDSHIFT MCT 7-Speed sports transmission, highlighting its advanced technology and contribution to the Mercedes CLS 63 AMG S-Model’s performance.
Performance-Oriented 4MATIC All-Wheel Drive
The performance-oriented AMG 4MATIC all-wheel-drive system is central to the Mercedes CLS 63 AMG S-Model‘s exceptional handling and driving excitement. By distributing engine torque with a rear bias of 33:67 between the front and rear wheels, the system prioritizes a dynamic and engaging driving experience. This rear-biased setup ensures optimal handling characteristics, reminiscent of rear-wheel-drive sports cars, while providing the added traction and stability of all-wheel drive.
The 3-stage ESP® (Electronic Stability Program) is specifically calibrated to work in harmony with the full-time all-wheel-drive system. In “SPORT Handling” mode, the Torque Vectoring Brake system selectively applies braking force to individual wheels, further enhancing agility and cornering prowess. Subtle braking of the inside rear wheel during cornering induces a neutral steering response, contributing to the car’s remarkably balanced handling.
The core of the 4MATIC system is a transfer case seamlessly integrated with the AMG SPEEDSHIFT MCT 7-Speed sports transmission, minimizing added space and weight. The system adds only approximately 155 lbs to the vehicle’s overall weight, a testament to its efficient and compact design. A multi-plate clutch with a locking force of 37 lb.-ft. regulates torque distribution to all four wheels as needed, ensuring optimal grip in various driving conditions.
Enhanced Traction with Limited-Slip Rear Differential
Taking performance a step further, the Mercedes CLS 63 AMG S-Model is equipped standard with a limited-slip rear differential, integrated within the rear final drive. This advanced component significantly enhances traction, particularly during spirited driving and on the racetrack. By optimizing power delivery to the rear wheels, the limited-slip differential contributes to even sharper vehicle dynamics and increased driving enjoyment.
AMG Adaptive Sports Suspension
All CLS 63 AMG models are fitted with AMG Adaptive Sports Suspension, featuring an electronically controlled damping system. Drivers can easily adjust the suspension settings via a dedicated button on the AMG DRIVE UNIT, toggling between “Comfort,” “Sport,” and “Sport Plus” modes. The front suspension utilizes a steel-spring system, while the rear axle incorporates a load-leveling air suspension system, ensuring both comfort and dynamic handling.
Further refinements to the suspension system in the S-Model and all-wheel-drive CLS 63 AMG include optimized three-link front suspension with newly developed aluminum control arms. These enhancements improve grip, agility, and steering neutrality during high-speed cornering. The S-Model further benefits from performance-oriented elastokinematics, providing even more neutral handling and enhanced feedback at the limits of adhesion. A wider front track (increased by 0.9 inches) contributes to greater stability during cornering and improved road feel. Increased negative camber on all wheels also plays a role in maximizing cornering performance.
AMG’s electromechanical speed-sensitive steering system complements the chassis setup, offering a rack-and-pinion steering ratio of 14:1 for agile handling. The variable power assist adjusts based on the selected suspension mode, providing optimal steering feel in all driving scenarios.
Exclusive Design Features and Optional Ceramic Brakes
The high-performance S-Model distinguishes itself visually with exclusive 10-spoke light-alloy wheels finished in matte titanium gray with a high-sheen rim flange. In contrast, the standard CLS 63 AMG features triple five-spoke light-alloy wheels in titanium gray with a high-sheen finish. Both models are equipped with staggered tire sizes, 255/35 tires on 9 x 19-inch front wheels and 285/30 tires on 10 x 19-inch rear wheels.
For ultimate braking performance, the Mercedes CLS 63 AMG is equipped with a high-performance AMG braking system featuring 14.2-inch ventilated and perforated brake discs on all four wheels. The front discs utilize AMG’s compound disc technology, proven in motorsport, for enhanced heat dissipation and fade resistance. The standard brake calipers are finished in grey with white AMG lettering, featuring six pistons at the front and four at the rear for powerful and consistent braking.
Alt text: Detailed view of the optional AMG ceramic high-performance composite brake system on the Mercedes CLS 63 AMG S-Model, highlighting the large ceramic discs and bronze calipers.
Exclusively for the S-Model, an optional AMG ceramic composite brake system is available. Easily identifiable by even larger 15.8-inch brake discs and bronze metallic calipers adorned with the “AMG Carbon Ceramic” logo, this system offers superior heat resistance and extended service life due to the exceptional hardness of ceramic brake discs. Furthermore, the ceramic system is approximately 40 percent lighter than the standard system, reducing unsprung mass, which further enhances handling, agility, and ride comfort.
S-Model Specific Interior and Audio
Subtle design cues further differentiate the CLS 63 AMG S-Model. Red brake calipers and an “S” in contrasting black on the AMG logo on the trunk lid are exterior identifiers. Inside, the standard black premium nappa leather interior of the S-Model features silver seat belts and contrasting gray stitching on the AMG sports seats, door panels, armrests, steering wheel, and center console. The AMG Performance steering wheel, trimmed in black premium leather and Alcantara® grip areas, also features a flattened top and bottom. The front head restraints of the AMG sports seats are embossed with the AMG crest. The AMG instrument cluster features an “S AMG” logo on the speedometer and red accents on the dials, while illuminated AMG door sill panels with white backlighting complete the exclusive appointments.
For audiophiles, the optional Bang & Olufsen BeoSound AMG high-end surround sound system is a highlight across the CLS range. Developed in collaboration with Bang & Olufsen, this system delivers an unparalleled audio experience with a 1,200-watt amplifier, 14 high-end speakers, and Dolby Digital 5.1 playback capability. A digital sound processor (DSP) allows for customized sound settings, including a special B&O sound menu within the COMAND system. “True Image™” mode allows individual sound adjustments for front, center, and rear, creating a realistic soundstage. Preset sound modes offer choices between a “Reference” studio sound and immersive surround sound. Illuminated 50-watt tweeters with acoustic lens technology and high-end speaker covers in silver chrome with Bang & Olufsen logos further enhance the system’s exclusivity.
Market Launch
The Mercedes CLS 63 AMG 4MATIC and the new Mercedes CLS 63 AMG S-Model 4MATIC were launched in the U.S. market in August 2013, bringing a new era of performance and luxury to the four-door coupe segment.
Conclusion
The Mercedes CLS 63 AMG S-Model represents the pinnacle of performance and luxury within the CLS-Class lineup. With its significantly enhanced power output, performance-oriented all-wheel drive, and exclusive features, it delivers an unrivaled driving experience. For those seeking the ultimate in four-door coupe performance, the Mercedes CLS 63 AMG S-Model stands as the definitive choice. Its blend of raw power, refined handling, and opulent luxury sets a new benchmark in its segment, solidifying its position as a true automotive masterpiece.
