The Mercedes-Benz CLS 63 AMG represents the pinnacle of four-door coupé engineering, blending brutal performance with executive refinement in a package that continues to define the luxury grand touring segment. Since its introduction, this flagship model has consistently challenged conventional boundaries between sports cars and luxury saloons, delivering an experience that satisfies both the boardroom executive and the weekend track enthusiast. The current generation showcases Mercedes-AMG’s commitment to technological innovation whilst maintaining the visceral character that made the original CLS such a revolutionary force in the automotive landscape.
What sets the CLS 63 AMG apart from its contemporaries isn’t merely its impressive specification sheet, but rather its ability to seamlessly transition between roles. During weekday commutes, it operates as a supremely comfortable luxury cruiser, yet transforms into a formidable performance machine when the driving situation demands. This duality reflects the sophisticated engineering that underpins every aspect of the vehicle, from its advanced powerplant to its intelligent chassis systems.
Mercedes-benz CLS 63 AMG performance specifications and engine analysis
AMG 5.5-litre V8 BiTurbo engine architecture and power output
At the heart of the CLS 63 AMG lies the renowned M157 5.5-litre twin-turbocharged V8 engine, a masterpiece of modern automotive engineering that delivers extraordinary performance whilst maintaining surprising efficiency for its displacement. The standard configuration produces 557 horsepower and 720 Nm of torque, whilst the S-Model variant elevates output to an impressive 585 horsepower and 800 Nm of torque. This substantial power increase over the naturally aspirated predecessor demonstrates how forced induction technology has revolutionised high-performance engine design.
The engine’s architecture incorporates several innovative features that distinguish it from conventional V8 powerplants. Twin turbochargers positioned within the engine’s ‘V’ configuration reduce lag whilst improving thermal efficiency, whilst the closed-deck aluminium construction ensures exceptional structural integrity under extreme loads. The result is an engine that delivers linear power delivery throughout the rev range, creating a driving experience that feels remarkably similar to a naturally aspirated unit despite its turbocharged nature.
AMG performance 4MATIC+ All-Wheel drive system integration
The optional 4MATIC all-wheel drive system transforms the CLS 63 AMG’s on-road capabilities, particularly in challenging weather conditions or during aggressive acceleration scenarios. This intelligent system distributes torque between front and rear axles based on driving conditions, traction requirements, and selected drive mode. Under normal circumstances, the system operates with a rear-biased torque split, maintaining the traditional AMG driving character whilst providing additional security when grip levels diminish.
What makes the 4MATIC system particularly sophisticated is its ability to continuously monitor wheel speeds, steering inputs, and throttle position to predict when additional traction might be required. The system can redirect up to 50% of available torque to the front wheels when necessary, yet remains virtually imperceptible during normal driving conditions. This seamless operation ensures that the CLS 63 AMG retains its sporting character whilst gaining significant all-weather capability.
AMG speedshift MCT 9G-Tronic transmission performance metrics
The AMG Speedshift MCT transmission represents a fascinating hybrid approach to high-performance gearbox design, combining the convenience of an automatic transmission with the responsiveness typically associated with dual-clutch systems. Rather than using a traditional torque converter, the MCT system employs a wet multi-plate clutch that enables faster gear changes and more direct connection between engine and drivetrain. This configuration delivers shift times as low as 100 milliseconds in Race mode, rivalling dedicated dual-clutch transmissions.
The transmission features four distinct operating modes that fundamentally alter its character. Comfort mode prioritises smoothness and efficiency, whilst Sport and Sport+ progressively sharpen throttle response and shift patterns. Manual mode provides complete driver control, with the transmission holding gears until the rev limiter if desired. The paddle shifters behind the steering wheel offer immediate gear selection, creating an engaging driving experience that satisfies purist preferences whilst maintaining the convenience of automatic operation.
Track-focused acceleration times and top speed capabilities
Performance figures for the CLS 63 AMG demonstrate the effectiveness of its sophisticated powertrain integration. The standard model achieves 0-62 mph acceleration in just 4.2 seconds, whilst the S-Model reduces this figure to an impressive 4.1 seconds. With 4MATIC all-wheel drive, these times drop further to 3.7 seconds for the standard model and 3.6 seconds for the S variant. These figures place the CLS 63 AMG firmly in supercar territory whilst maintaining the practical advantages of a four-door configuration.
Top speed remains electronically limited to 155 mph as standard, though the optional AMG Driver’s Package raises this restriction to 186 mph. This limitation reflects Mercedes-AMG’s focus on real-world usability rather than headline-grabbing numbers, as the vehicle’s aerodynamic configuration and cooling systems are optimised for sustained high-speed cruising rather than maximum velocity. The result is a machine capable of maintaining impressive pace over extended distances without compromising occupant comfort or mechanical reliability.
Advanced AMG suspension and chassis dynamics
AMG ride control+ air suspension with adaptive damping
The CLS 63 AMG’s suspension system exemplifies the sophisticated engineering required to balance performance capabilities with luxury comfort expectations. The standard steel spring setup provides excellent body control and precise handling characteristics, whilst the optional AMG Ride Control+ air suspension adds variable ride height and adaptive damping capabilities. This system continuously monitors road conditions, driving style, and vehicle dynamics to optimise suspension settings in real-time.
What sets this suspension apart from conventional adaptive systems is its ability to independently control each wheel’s damping characteristics based on localised conditions. The system can simultaneously provide firm damping at one corner whilst maintaining softer settings at another, creating a remarkably flat and controlled ride quality even over challenging road surfaces. This technology becomes particularly apparent during spirited driving, where the suspension manages to maintain exceptional body control whilst preserving ride comfort that would be acceptable in a luxury saloon.
AMG dynamic select drive modes and electronic stability programme
The AMG Dynamic Select system provides comprehensive control over the vehicle’s personality through five distinct drive modes: Comfort, Sport, Sport+, Individual, and Race. Each mode alters engine mapping, transmission behaviour, suspension settings, and stability system intervention levels to create dramatically different driving experiences from the same vehicle. Comfort mode transforms the CLS 63 AMG into a refined long-distance cruiser, whilst Race mode unleashes its full performance potential with minimal electronic intervention.
The Electronic Stability Programme (ESP) has been specifically calibrated for AMG applications, allowing considerably more freedom before intervention whilst maintaining ultimate safety margins. The system features three distinct settings: ESP On provides maximum stability assistance, ESP Sport permits controlled oversteer whilst preventing dangerous situations, and ESP Off removes most electronic assistance for track use. This flexibility ensures that experienced drivers can explore the vehicle’s handling limits whilst novice users benefit from comprehensive safety systems.
AMG performance steering and variable ratio system
The AMG-specific steering system employs variable ratio technology that adjusts the relationship between steering wheel input and front wheel response based on vehicle speed and driving conditions. At low speeds, the system provides lighter steering effort and quicker response for parking maneuvers, whilst highway speeds bring increased stability and reduced sensitivity to minor inputs. This technology creates an intuitive driving experience that feels natural across all operating conditions.
The steering wheel itself incorporates several AMG-specific features, including a flattened bottom section for improved ergonomics during spirited driving and Alcantara trim surfaces that provide enhanced grip. The wheel houses controls for the drive mode selector, suspension settings, and transmission behaviour, allowing drivers to adjust vehicle dynamics without removing their hands from the steering wheel. This integration demonstrates the attention to detail that characterises the AMG engineering philosophy.
Carbon-ceramic brake system and AMG compound braking performance
The optional carbon-ceramic brake system represents one of the most significant performance upgrades available for the CLS 63 AMG, providing exceptional stopping power whilst reducing unsprung weight by approximately 19 kilograms compared to conventional steel discs. These massive 390mm front and 370mm rear discs are manufactured using a carbon fibre matrix that provides superior heat dissipation and virtually eliminates brake fade during extended high-performance driving sessions.
Beyond their thermal advantages, carbon-ceramic brakes offer remarkably consistent pedal feel and modulation characteristics that remain unchanged regardless of operating temperature. The distinctive orange AMG callipers house six-piston front and four-piston rear configurations that provide exceptional clamping force distribution across the disc surface. Whilst the initial cost premium is substantial at £9,300, the system’s longevity and performance advantages make it worthwhile for owners who regularly exploit the vehicle’s capabilities on track days or challenging mountain roads.
CLS 63 AMG interior technology and infotainment systems
The interior of the CLS 63 AMG creates an environment that successfully balances sporting intentions with luxury expectations, incorporating materials and technologies that reflect the vehicle’s premium positioning. The standard AMG Performance seats feature extensive adjustment capabilities and integrated massage functions, whilst maintaining the lateral support necessary for spirited driving. These seats are upholstered in high-quality leather with contrast stitching that emphasises the cabin’s sporting character whilst providing the comfort expected in a luxury grand tourer.
The dashboard architecture draws inspiration from Mercedes-AMG’s flagship models, featuring a prominent central display screen that houses the COMAND infotainment system. This 8-inch display provides access to navigation, entertainment, and vehicle settings through an intuitive interface that responds quickly to inputs. The system supports smartphone integration through Apple CarPlay and Android Auto, whilst the premium Burmester sound system delivers exceptional audio quality that enhances the driving experience during long-distance journeys.
Climate control systems incorporate multi-zone capabilities that allow individual temperature and airflow preferences for each occupant, whilst the optional Thermotronic system adds automatic climate management that maintains optimal cabin conditions regardless of external weather. The flat-bottomed AMG steering wheel houses comprehensive controls for most vehicle functions, reducing the need to interact with dashboard controls whilst driving. These ergonomic considerations demonstrate the sophisticated integration of luxury and performance that characterises the modern AMG philosophy.
Exterior design elements and aerodynamic engineering
The CLS 63 AMG’s exterior design represents a masterful evolution of the original four-door coupé concept, incorporating aerodynamic enhancements that improve both visual appeal and functional performance. The distinctive AMG Panamericana grille immediately identifies the vehicle’s performance credentials, whilst integrated air intakes direct cooling airflow to essential components. The sculptured bonnet features subtle power bulges that accommodate the substantial V8 engine whilst maintaining the sleek profile that defines the CLS aesthetic.
Aerodynamic efficiency receives considerable attention throughout the design process, with active elements that adjust based on driving conditions and cooling requirements. The front air dam incorporates adjustable elements that reduce drag during highway cruising whilst opening to provide additional cooling during high-performance driving. Similarly, the rear spoiler deploys automatically at speeds above 80 mph to enhance high-speed stability, retracting at lower velocities to maintain the clean lines that characterise the CLS silhouette.
The available carbon fibre exterior packages add visual drama whilst providing functional benefits through reduced weight and improved aerodynamic efficiency. These components include front splitters, side skirts, and rear diffusers that work together to manage airflow around and underneath the vehicle. The distinctive 19-inch AMG wheels not only provide appropriate visual presence but also house the substantial brake components whilst maintaining optimal unsprung weight distribution for superior handling characteristics.
Real-world driving experience and performance testing
Nürburgring nordschleife lap time analysis and circuit performance
Track performance represents one of the most demanding tests of any high-performance vehicle, and the CLS 63 AMG demonstrates remarkable capability when unleashed on challenging circuits. Independent testing has recorded lap times that place the CLS 63 AMG within striking distance of dedicated sports cars, despite its four-door configuration and luxury appointments. The vehicle’s sophisticated chassis dynamics become immediately apparent under track conditions, where the advanced suspension systems maintain precise wheel control even over the Nürburgring’s notorious surface irregularities.
What impresses most about the CLS 63 AMG’s track performance is its consistency throughout extended sessions. Where many luxury performance vehicles begin to show thermal limitations after several laps, the Mercedes maintains stable brake pedal feel and engine power delivery thanks to its sophisticated cooling systems. The carbon-ceramic brakes prove their worth in these conditions, providing fade-free stopping power that inspires confidence during late braking manoeuvres into challenging corners.
Fuel economy testing under WLTP certification standards
Real-world fuel consumption figures reveal the impressive efficiency gains achieved through the twin-turbocharged engine architecture and advanced transmission technology. Under WLTP testing protocols, the CLS 63 AMG achieves approximately 26.6 mpg combined, representing a significant improvement over the naturally aspirated predecessor despite substantially increased performance. These figures reflect the engine’s ability to operate efficiently during part-throttle conditions whilst delivering exceptional power when required.
Highway cruising scenarios demonstrate even better efficiency, with careful driving techniques yielding consumption figures approaching 30 mpg during extended motorway journeys. The nine-speed transmission contributes significantly to these results through its ability to maintain engine speeds below 2,000 rpm during steady-state cruising. However, enthusiastic driving quickly reduces these figures to the mid-teens, reflecting the substantial fuel requirements of the high-performance V8 engine under load.
Daily usability assessment and grand touring capabilities
Perhaps the most impressive aspect of the CLS 63 AMG lies in its ability to function as a practical daily driver whilst maintaining its performance credentials. The cabin provides genuine accommodation for four adults, with rear passengers enjoying adequate legroom and headroom for journeys of moderate duration. The 520-litre boot capacity proves sufficient for weekend luggage whilst maintaining the low loading lip that facilitates easy access to stored items.
Urban driving reveals the sophistication of the vehicle’s adaptive systems, with the air suspension automatically lowering the vehicle for improved aerodynamics during highway cruising whilst raising it slightly for improved ground clearance in car parks or over speed bumps. The start-stop system operates seamlessly in traffic conditions, whilst the advanced driver assistance systems reduce fatigue during congested commuting scenarios. These practical considerations demonstrate that high performance need not compromise everyday usability.
Comparison against BMW M6 gran coupé and audi RS7 sportback
Direct comparison with key competitors reveals the CLS 63 AMG’s unique position within the high-performance four-door segment. The BMW M6 Gran Coupé offers similar performance figures but adopts a more track-focused approach that sacrifices some comfort for ultimate handling precision. The Audi RS7 Sportback provides comparable acceleration and a more distinctive exterior design, whilst the CLS 63 AMG emphasises luxury and refinement alongside its performance capabilities.
Pricing strategies differ significantly between these competitors, with the CLS 63 AMG positioned as the premium option when fully equipped with desirable options. However, the Mercedes justifies its price premium through superior interior materials, more advanced technology systems, and the distinctive styling that continues to turn heads years after its introduction. The choice between these vehicles ultimately depends on individual priorities regarding performance focus, luxury appointments, and brand preferences.
Ownership costs and Mercedes-AMG maintenance requirements
Long-term ownership of the CLS 63 AMG requires consideration of several cost factors beyond the substantial initial purchase price. Annual depreciation typically ranges between 15-20% during the first three years, though this varies significantly based on mileage, condition, and specification. The carbon-ceramic brake option, despite its high initial cost, can actually reduce long-term expenses through extended service intervals and reduced replacement frequency compared to conventional brake systems.
Scheduled maintenance follows Mercedes-AMG’s specific requirements, with service intervals typically occurring every 12,500 miles or annually, whichever occurs first. The sophisticated engine management systems require genuine Mercedes-approved lubricants and components to maintain optimal performance and warranty coverage. Insurance costs reflect the vehicle’s high performance capabilities and replacement values, with premiums varying significantly based on driver age, location, and driving history.
The CLS 63 AMG represents the ultimate expression of the four-door coupé concept, delivering supercar performance in a package that maintains genuine everyday usability.
Extended warranty options provide peace of mind for owners concerned about potential repair costs once the standard warranty expires. These programmes typically cover major mechanical components whilst excluding normal wear items such as brake pads, tyres, and routine service components. The availability of Mercedes-AMG certified pre-owned programmes ensures that quality examples receive thorough inspection and warranty coverage, making used CLS 63 AM
G purchases a particularly attractive proposition for those seeking to combine prestige ownership with performance credentials.
Fuel costs represent a significant ongoing expense for CLS 63 AMG owners, with the high-performance V8 engine requiring premium unleaded fuel for optimal operation. Real-world consumption patterns typically range from 15-30 mpg depending on driving style and conditions, translating to substantial annual fuel expenditure for high-mileage users. The vehicle’s 80-litre fuel tank provides reasonable range during highway cruising, though spirited driving sessions can dramatically reduce this figure.
Tyre replacement costs merit particular attention, as the CLS 63 AMG’s substantial power output and aggressive suspension settings can accelerate wear rates significantly. The standard 19-inch performance tyres typically require replacement every 15,000-25,000 miles under normal usage, though track days or aggressive driving can reduce this interval considerably. Premium tyre brands that match the vehicle’s performance capabilities command substantial prices, with a complete set often exceeding £1,500 including fitting and balancing.
The Mercedes-AMG ownership experience extends beyond mere transportation, encompassing exclusive events, driving experiences, and technical support that justify the premium investment. Access to AMG driving academies provides opportunities to explore the vehicle’s capabilities in controlled environments, whilst exclusive owner events create networking opportunities among fellow enthusiasts. These intangible benefits contribute significantly to the overall ownership proposition, particularly for those who view their CLS 63 AMG as more than merely a means of transportation.
For those seeking the ultimate combination of luxury, performance, and exclusivity in a four-door configuration, the CLS 63 AMG delivers an ownership experience that transcends conventional automotive categories.