Mercedes-Benz has long been synonymous with luxury and performance, and the CLS 63 AMG S-Model elevates this reputation to new heights. This four-door coupe isn’t just about stunning aesthetics; it’s a powerhouse of engineering, blending breathtaking speed with sophisticated comfort. The CLS 63 Mercedes-Benz AMG S-Model represents the pinnacle of the CLS lineup, offering a driving experience that is both exhilarating and refined.
The 2014 update to the Mercedes-Benz CLS 63 AMG line introduced the formidable S-Model, a variant engineered for those who demand the ultimate in performance. At its heart lies the handcrafted AMG 5.5-liter V8 biturbo engine, a masterpiece of engineering that churns out an astounding 577 horsepower and 590 lb.-ft. of torque. This robust engine, internally known as the M157, is celebrated for its remarkable efficiency, delivering high-octane performance without sacrificing fuel economy – a rare feat in the high-performance vehicle segment.
Mercedes-AMG’s commitment to pushing boundaries is further evidenced by the integration of their performance-oriented 4MATIC all-wheel-drive system into a range of high-performance sedans and coupes. This system, designed for sporty driving dynamics, provides a level of traction and control previously unheard of in this class. Beyond SUVs like the ML63 AMG, GL63 AMG, and G63 AMG, the CLA, E-Class, and, most notably, the CLS-Class now benefit from the standard high-performance AMG 4MATIC system.
Ola Källenius, CEO of Mercedes-AMG GmbH, aptly highlighted the S-Model’s position: “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 emphasized the AMG 5.5-liter V8 engine’s efficiency, stating it remains “the most efficient series production V8 engine in the world.” The introduction of customized model variants like the S-Model provides discerning customers with an unprecedented level of personalization.
| Feature | 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 |
Alt text: Sleek exterior of a CLS 63 AMG S-Model Mercedes-Benz showcasing its four-door coupe design and sporty stance.
Unleashing Unrivaled Performance
The CLS 63 Mercedes-Benz AMG S-Model’s acceleration from 0 to 60 mph in a mere 3.6 seconds firmly places it at the forefront of its competitive landscape. This blistering speed is not solely attributed to its increased power output, but also significantly to its performance-oriented all-wheel drive system. The 4MATIC system in the S-Model features a rear-biased power distribution of 33:67, optimizing traction during acceleration and minimizing wheel slippage. This intelligent system allows the S-Model to achieve an electronically limited top speed of 186 mph, further highlighting its performance credentials.
The AMG 5.5-liter V8 biturbo engine in the CLS 63 AMG S-Model delivers a substantial 577 horsepower and 590 lb.-ft. of torque. This represents a notable increase of 27 horsepower compared to the standard AMG Performance Package previously available. This enhanced power is achieved through refined engine electronics and an elevated turbo boost pressure, increased from 0.9 to 1.0 bar. Even the base CLS 63 AMG model benefits from this advancement, boasting 550 hp and 531 lb.-ft. of torque, a 32 hp increase over its predecessor. Despite these power gains, all models in the CLS 63 AMG range maintain impressive fuel efficiency and low emissions, a testament to AMG’s engineering prowess.
Alt text: Detailed view of the powerful AMG 5.5-liter V8 biturbo engine inside the CLS 63 Mercedes-Benz, emphasizing its high-performance engineering.
AMG SPEEDSHIFT MCT 7-Speed Sports Transmission: Precision and Control
A key component of the CLS 63 Mercedes-Benz AMG driving experience is the AMG SPEEDSHIFT MCT 7-Speed sports transmission. This transmission offers a range of custom-tailored settings, allowing drivers to personalize their driving dynamics. Four distinct drive programs – “C” (Controlled Efficiency), “S” (Sport), “S+” (Sport plus), and “M” (Manual) – cater to various driving preferences and conditions.
In “C” mode, the transmission prioritizes smooth and comfortable gearshifts. The ECO start/stop feature is activated, enhancing fuel efficiency by automatically shutting off the V8 engine when the car is stationary. In this mode, the car typically starts in second gear for smoother launches.
Switching to “S”, “S+”, or “M” modes transforms the driving character, making the engine and transmission noticeably more responsive and agile. The ECO start/stop function is deactivated in these sportier modes. Designed for spirited driving, the transmission features momentary suppression of ignition and injection during full-throttle upshifts, resulting in rapid gear changes accompanied by a thrilling exhaust note. Automatic rev-matching during downshifts and RACE START functionality are also standard features, further enhancing the performance-oriented nature of the AMG SPEEDSHIFT MCT 7-Speed sports transmission.
Alt text: Interior detail of the CLS 63 AMG Mercedes-Benz showcasing the AMG SPEEDSHIFT MCT 7-Speed sports transmission gear selector and luxurious cabin.
Performance-Oriented 4MATIC All-Wheel Drive: Maximum Grip and Excitement
The performance-oriented AMG 4MATIC all-wheel drive system in the CLS 63 Mercedes-Benz is engineered to deliver maximum driving excitement while maintaining optimal control. It distributes engine torque with a rear-biased ratio of 33:67 between the front and rear wheels. This rear-wheel-drive emphasis provides for engaging handling and driving dynamics that are characteristic of high-performance sports cars.
The 3-stage ESP® (Electronic Stability Program) system is specifically calibrated to complement the full-time all-wheel-drive system. In “SPORT Handling” mode, the Torque Vectoring Brake system applies selective braking to individual wheels, enhancing agility and responsiveness. Subtly braking the inside rear wheel during cornering induces a neutral steering response, improving turn-in capabilities.
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 added weight. Torque is transferred to the front differential via a propeller shaft, and power is delivered to the left front wheel through an intermediate shaft routed through a sealed duct in the engine oil pan. This clever packaging results in a relatively low additional weight of only 155 lbs for the all-wheel-drive system. A multi-plate clutch with a locking force of 37 lb.-ft. manages torque distribution to all four wheels as needed, ensuring optimal traction in various driving conditions.
CLS 63 AMG S-Model: Enhanced Traction with Limited-Slip Rear Differential
Taking performance a step further, the CLS 63 Mercedes-Benz AMG S-Model comes standard with a limited-slip differential integrated into the rear final drive. This advanced technology further enhances traction, particularly during aggressive driving maneuvers and on the racetrack. The limited-slip differential optimizes power delivery to the rear wheels, maximizing grip and improving vehicle dynamics for an even more exhilarating driving experience.
All CLS 63 AMG models are equipped with AMG Adaptive Sports Suspension, featuring an electronically controlled damping system. Drivers can easily adjust the suspension settings by pressing a button on the AMG DRIVE UNIT, switching between “Comfort,” “Sport,” and “Sport Plus” modes. The front suspension utilizes a steel-spring system, while the rear axle is fitted with a load-leveling air suspension system, ensuring a balance of comfort and performance.
The three-link front suspension has been further refined on the S-Model and the CLS 63 AMG with all-wheel drive. New aluminum control arms enhance grip, agility, and steering neutrality during high-speed cornering. The S-Model features performance-oriented elastokinematics, providing drivers with more neutral handling, improved feedback, and enhanced wheel grip at the limits of adhesion. A wider front track (increased by 0.9 inches or 2.4 cm) contributes to greater stability during high-speed cornering and improved road feel. Increased negative camber on all wheels further optimizes cornering performance.
AMG’s electromechanical speed-sensitive steering complements the chassis setup. A rack-and-pinion steering ratio of 14:1 delivers agile handling in curves, and the variable power assist adapts based on the selected suspension mode, providing optimal steering feel in all driving situations.
The high-performance S-Model is distinguished 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 255/35 tires on 9 x 19-inch wheels at the front and wider 285/30 tires on 10 x 19 rear wheels.
Alt text: Close-up of the CLS 63 AMG Mercedes-Benz wheels and high-performance AMG braking system, highlighting the sporty design and engineering.
AMG High-Performance Braking Systems: Exceptional Stopping Power
The CLS 63 Mercedes-Benz AMG models are equipped with a high-performance AMG braking system featuring 14.2-inch ventilated and perforated brake discs on both front and rear axles. The front discs utilize AMG’s compound disc technology, extensively tested in motorsport, to withstand extreme heat. The standard CLS 63 AMG features brake calipers with a grey finish and white AMG lettering, incorporating six pistons at the front and four at the rear, ensuring rapid, fade-resistant braking and short stopping distances.
For the ultimate in braking performance, an optional AMG ceramic composite brake system is exclusively available for the S-Model. This system is easily identifiable by even larger 15.8-inch brake discs with an “AMG Carbon Ceramic” logo on bronze metallic calipers. The exceptional hardness of ceramic brake discs offers superior resistance to extreme heat and extends service life. This ceramic system is also approximately 40 percent lighter, reducing unsprung mass, which in turn enhances handling, agility, and ride comfort.
Distinctive S-Model Design Cues
The CLS 63 Mercedes-Benz AMG S-Model is subtly differentiated by several unique design features. Red brake calipers and an “S” in contrasting black on the AMG logo on the trunk lid instantly identify the top-tier model. 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 in the S-Model feature an embossed AMG crest in the premium leather. The AMG instrument cluster further distinguishes the S-Model with an “S AMG” logo on the speedometer and red accents on the dials. Illuminated AMG door sill panels with white backlighting complete the exclusive appointments of the S-Model.
Bang & Olufsen BeoSound AMG High-End Surround Sound System: Auditory Excellence
An exceptional optional feature for all CLS models is the Bang & Olufsen BeoSound AMG high-end surround sound system. Developed in collaboration with renowned Danish audio specialists Bang & Olufsen, this system delivers an unparalleled auditory experience. Capable of Dolby Digital 5.1 playback, the system boasts a 1,200-watt amplifier and 14 high-end speakers with neodymium drivers. An integrated digital sound processor (DSP) manages music signal distribution, allowing for customized sound settings via a special B&O sound menu in the COMAND system.
In True Image™ mode, individual sound settings for the front, center, and rear can be adjusted, creating a realistic sound experience tailored to the listener’s position. The “Sound Mode” menu offers preset sound modes, including a high-end “Reference” studio sound and immersive surround sound options. “Reference” mode focuses on faithful reproduction of the artist’s intended sound, while surround sound mode provides a spacious and panoramic auditory experience, particularly enhancing live recordings and concertos.
Illuminated 50-watt tweeters with acoustic lens technology, positioned in the mirror triangle, add a visual highlight. High-end speaker covers in silver chrome adorned with Bang & Olufsen logos further identify this exceptional sound system.
The CLS 63 Mercedes-Benz AMG S-Model stands as a testament to Mercedes-AMG’s dedication to performance, luxury, and innovation. From its handcrafted V8 biturbo engine to its meticulously engineered chassis and sophisticated interior, the CLS 63 AMG S-Model offers a driving experience that is truly in a class of its own. For those seeking the ultimate blend of power, refinement, and exclusivity, the CLS 63 AMG S-Model remains an unparalleled choice.
