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 reputation even further, introducing a performance upgrade and an entirely new model to the lineup: the CLS 63 AMG S-Model. This iteration not only maintained the CLS 63 AMG’s position as a leader in its class but also pushed the boundaries of power and handling with the inclusion of performance-oriented AMG 4MATIC all-wheel drive and a potent AMG 5.5-liter V8 biturbo engine.
At the heart of the 2014 Mercedes-Benz CLS 63 AMG and S-Model lies the remarkable AMG 5.5-liter V8 biturbo engine, internally known as the M157. This engine is celebrated for its unparalleled efficiency, delivering high performance without sacrificing fuel economy – a rare feat in the high-performance automotive world. The standard CLS 63 AMG boasts an impressive 550 horsepower and 531 lb.-ft. of torque, figures that alone place it among the elite. However, the S-Model takes performance to another level, cranking out a staggering 577 horsepower and 590 lb.-ft. of torque. This enhanced power output ensures that the Mercedes-Benz CLS 63 AMG S-Model stands unchallenged in its segment, offering an exhilarating driving experience.
Mercedes-AMG’s commitment to performance extends beyond just engine power. The introduction of AMG-engineered 4MATIC all-wheel drive to select high-performance sedans and coupes, including the Mercedes-Benz CLS 63 AMG, marks a significant step forward. This system is specifically tuned for sporty driving, providing a level of performance and control previously unseen in this vehicle category. Joining the ranks of successful AMG SUVs like the ML 63 AMG, GL 63 AMG, and G 63 AMG, the CLS, E-Class, and CLA lines now feature models equipped with this advanced AMG 4MATIC system as standard, broadening the availability of this high-performance technology.
Ola Källenius, CEO of Mercedes-AMG GmbH at the time of release, emphasized the significance of these models, stating, “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.” He further highlighted the engine’s efficiency, noting, “Our AMG 5.5-liter V8 engine remains the most efficient series production V8 engine in the world. The new, customized model variants provide greater scope than ever for individual solutions.”
| 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 | 3.7 seconds | 3.6 seconds |
| Top speed | 155 mph (electronically limited) | 186 mph (electronically limited) |
Unleashing Unrivaled Performance: The S-Model Advantage
The Mercedes-Benz CLS 63 AMG S-Model 4MATIC truly sits at the pinnacle of its competitive set. Achieving a blistering 0-60 mph acceleration in just 3.6 seconds, it’s clear this model is engineered for those who demand the ultimate in performance. This exceptional speed is not solely due to increased horsepower; the S-Model’s performance-oriented all-wheel drive system plays a crucial role. With a rear-biased 33:67 front-rear power distribution, the system optimizes traction during acceleration, minimizing wheel slip and ensuring maximum power delivery to the road. Furthermore, the electronically limited top speed is raised to an impressive 186 mph, reflecting the S-Model’s enhanced capabilities.
The power upgrade in the Mercedes-Benz CLS 63 AMG S-Model stems from fine-tuned engine electronics and an increase in turbo boost pressure, elevated from 0.9 to 1.0 bar. This adjustment, compared to the standard model, unlocks an additional 27 horsepower and 59 lb.-ft. of torque over the previous AMG Performance Package. Even the standard Mercedes-Benz CLS 63 AMG benefits from advancements, gaining 32 horsepower compared to its predecessor, showcasing Mercedes-AMG’s continuous pursuit of performance enhancement across the model range. Importantly, despite these power gains, both models maintain high fuel mileage and low exhaust emissions, reinforcing the efficiency of the AMG 5.5-liter V8 biturbo engine.
AMG SPEEDSHIFT MCT 7-Speed Sports Transmission: Precision and Versatility
A key component of the Mercedes-Benz CLS 63 AMG’s dynamic performance is the AMG SPEEDSHIFT MCT 7-Speed sports transmission. This transmission offers a range of custom-tailored settings designed to cater to diverse driving preferences and conditions. Four distinct drive programs – “C” (Controlled Efficiency), “S” (Sport), “S+” (Sport plus), and “M” (Manual) – allow drivers to personalize their driving experience.
In “C” mode, the focus is on smooth and comfortable gear changes. The ECO start/stop function is activated, automatically shutting off the V8 engine when the car comes to a complete stop, enhancing fuel efficiency in urban environments. The vehicle typically starts in second gear in this mode for gentler acceleration.
Switching to “S”, “S+”, or “M” modes transforms the driving dynamics. The engine and transmission become noticeably more responsive and agile. The ECO start/stop function is deactivated, and gear shifts are executed with greater speed and intensity. These modes are optimized for sporty driving, featuring momentary suppression of ignition and injection during full-throttle upshifts, resulting in quicker gear changes accompanied by a thrilling exhaust note. Automatic rev-matching during downshifts and RACE START functionality are also standard features, further enhancing the sporty driving experience.
Performance-Oriented 4MATIC All-Wheel Drive: Maximum Grip and Excitement
The performance-oriented AMG 4MATIC all-wheel-drive system in the Mercedes-Benz CLS 63 AMG is engineered to deliver maximum driving enjoyment and control. It distributes engine torque with a rear-biased 33:67 ratio between the front and rear wheels. This rear-wheel-drive emphasis provides the characteristic handling feel that enthusiasts crave while benefiting from the added traction of all-wheel drive. The 3-stage ESP® (Electronic Stability Program) system is specifically calibrated to work in harmony with the full-time all-wheel-drive system, offering various levels of intervention to suit different driving styles and conditions.
In “SPORT Handling” mode, the Torque Vectoring Brake system comes into play, selectively applying braking force to individual wheels to enhance agility during cornering. By briefly braking the inside rear wheel, the system induces a yaw moment, promoting impressively neutral steering response when turning into corners.
The core of the AMG 4MATIC system is a transfer case seamlessly integrated with the AMG SPEEDSHIFT MCT 7-Speed sports transmission. This compact design minimizes space intrusion and weight. Torque is transferred from the power take-off to the front differential via a propeller shaft, and power is delivered to the left front wheel through an intermediate shaft running through a sealed duct in the engine oil pan. This sophisticated yet compact design contributes to the all-wheel-drive system’s relatively low additional weight of only 155 lbs. A multi-plate clutch with a locking force of 37 lb.-ft. regulates torque distribution to all four wheels as needed, ensuring optimal traction in various driving scenarios.
CLS 63 AMG S-Model: Enhanced Dynamics with Limited-Slip Differential
The Mercedes-Benz CLS 63 AMG S-Model further refines its performance capabilities with a standard limited-slip differential integrated into the rear final drive. This advanced component elevates traction to an even higher level, resulting in improved vehicle dynamics and heightened driving pleasure, particularly on a racetrack or during spirited driving. The limited-slip differential optimizes power delivery to the rear wheels, minimizing wheelspin and maximizing cornering grip, allowing drivers to exploit the full potential of the S-Model’s potent engine and chassis.
All Mercedes-Benz CLS 63 AMG models are equipped with AMG Adaptive Sports Suspension, featuring an electronically controlled damping system. With a simple press of a button on the AMG DRIVE UNIT, drivers can switch between “Comfort,” “Sport,” and “Sport Plus” damping modes, instantly altering the suspension’s stiffness and responsiveness. The front suspension utilizes a steel-spring system, while the rear axle incorporates a load-leveling air suspension system, ensuring a comfortable ride even when carrying heavier loads or encountering uneven road surfaces.
The front three-link suspension design has been further refined on both the S-Model and the standard all-wheel-drive CLS 63 AMG. Newly developed aluminum control arms enhance grip, agility, and steering neutrality during high-speed cornering. The S-Model distinguishes itself with more performance-oriented elastokinematics, providing the driver with even more precise handling, feedback, and wheel grip at the limits of adhesion. A wider front track, increased by 0.9 inches (2.4 cm), contributes to enhanced stability at higher cornering speeds and improved road feel. Increased negative camber on all wheels further optimizes cornering performance, ensuring the Mercedes-Benz CLS 63 AMG delivers exceptional handling prowess.
AMG’s electromechanical speed-sensitive steering system complements the chassis setup, offering a rack-and-pinion steering ratio of 14:1 for agile handling in curves. The variable power assist adjusts based on the selected suspension mode, providing optimal steering feel and responsiveness in different driving situations.
The high-performance S-Model is visually differentiated by exclusive 10-spoke light-alloy wheels finished in matte titanium gray with a high-sheen rim flange. The standard CLS 63 AMG features triple five-spoke light-alloy wheels painted titanium gray with a high-sheen finish. Both models are equipped with staggered tire sizes, using 255/35 tires on 9 x 19-inch wheels at the front and wider 285/30 tires on 10 x 19 rear wheels, maximizing grip and performance.
Optional AMG Ceramic High-Performance Composite Brake System: Uncompromising Stopping Power
The Mercedes-Benz CLS 63 AMG comes standard with a high-performance AMG braking system featuring substantial 14.2-inch ventilated and perforated brake discs on both front and rear axles. The front discs utilize AMG’s compound disc technology, extensively proven in motorsport, to withstand extreme heat and ensure consistent braking performance. The standard system features grey-finished brake calipers with white AMG lettering, incorporating six pistons at the front and four pistons at the rear, providing rapid, fade-resistant braking and short stopping distances.
For those seeking the ultimate in braking performance, an optional AMG ceramic composite brake system is exclusively available for the S-Model. This system is identifiable by even larger 15.8-inch brake discs and bronze metallic calipers adorned with the “AMG Carbon Ceramic” logo. The exceptional hardness of ceramic brake discs offers superior resistance to extreme heat and extends service life. Furthermore, this ceramic system reduces weight by approximately 40 percent compared to conventional steel brakes, decreasing unsprung mass and enhancing handling, agility, and ride comfort.
Distinctive S-Model Design Cues: Subtle Yet Striking
The Mercedes-Benz CLS 63 AMG S-Model is subtly distinguished by several unique design elements. Red brake calipers immediately set it apart, along with an “S” in contrasting black added to the AMG logo on the trunk lid. 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, center door panels, door armrests, steering wheel, and center console. The AMG Performance steering wheel, trimmed in black premium leather with Alcantara® grip areas, is flattened at the top and bottom for a sporty feel. The front head restraints of the AMG sports seats feature the AMG crest embossed directly into the premium leather, adding a touch of exclusivity. The AMG instrument cluster also incorporates an “S AMG” logo on the speedometer and red accents on the dials, further differentiating the S-Model. Illuminated AMG door sill panels with white backlighting complete the exclusive interior appointments.
Bang & Olufsen BeoSound AMG High-End Surround Sound System: An Auditory Masterpiece
An exceptional optional feature available for all Mercedes-Benz CLS models is the Bang & Olufsen BeoSound AMG high-end surround sound system. Developed in collaboration with renowned Danish audio specialist Bang & Olufsen, this system provides an unparalleled audio experience. Capable of Dolby Digital 5.1 playback, the system delivers exceptional sound quality through a 1,200-watt amplifier and 14 high-end speakers featuring neodymium drivers. An integrated digital sound processor (DSP) manages music signal distribution, allowing for customized sound settings.
The COMAND system offers a dedicated B&O sound menu. In True Image™ mode, individual sound settings for front, center, and rear speakers can be adjusted, creating a realistic soundstage at the chosen listening position. The “Sound Mode” menu provides preset sound modes, allowing users to select between a high-end “Reference” studio sound and immersive surround sound. “Reference” mode prioritizes faithful reproduction of the artist’s intended sound, while the surround sound mode creates a spacious and enveloping auditory experience, particularly enhancing live recordings and concertos. Illuminated 50-watt tweeters with acoustic lens technology, positioned in the mirror triangle, add visual elegance, while high-end speaker covers in silver chrome with Bang & Olufsen logos further distinguish this premium sound system.
The Mercedes-Benz CLS 63 AMG 4MATIC and the new CLS 63 AMG S-Model 4MATIC marked their U.S. market launch in August 2013, bringing a new era of performance and luxury to the four-door coupe segment.
