The 2015 Mercedes-Benz CLA 45 AMG 4MATIC Coupe burst onto the scene, making its grand debut at the New York International Auto Show in Spring 2013. This four-door coupe isn’t just another addition to the lineup; it’s a statement, echoing the design philosophy of the acclaimed CLS63 AMG, a true pioneer in the realm of high-performance four-door coupes. What truly sets the CLA 45 AMG apart is what lies beneath the hood: a groundbreaking engine producing a staggering 355 horsepower and 332 lb.-ft. of torque. This powertrain achievement officially crowns the 2015 CLA 45 AMG as the most potent four-cylinder production engine in the world. Complementing this raw power is the AMG Performance 4MATIC all-wheel drive system, establishing new benchmarks for vehicles in its class and ensuring that power translates to unparalleled performance on the road.
Ola Källenius, then CEO of Mercedes-AMG GmbH, emphasized the significance of this vehicle, stating, “The CLA 45 AMG embodies the very essence of AMG, presenting a uniquely desirable automobile infused with our characteristic DNA. Its high-tech composition, featuring the world’s most powerful four-cylinder production engine and the performance-tuned AMG 4MATIC all-wheel drive, perfectly encapsulates ‘Driving Performance’ at its absolute finest.” This bold statement underscores the CLA 45 AMG’s position as not just a car, but a testament to AMG’s engineering prowess.
Unleashing Pure AMG Power: The World’s Most Powerful Four-Cylinder Engine
At the heart of the 2015 CLA 45 AMG Coupe beats a revolutionary 2.0-liter turbo engine. This isn’t just any engine; it’s the most powerful turbocharged four-cylinder production engine ever created, delivering an impressive 355 hp and 332 lb.-ft. of torque. This formidable combination of high horsepower, robust torque, and performance-optimized all-wheel drive propels the CLA 45 AMG to deliver truly exceptional driving dynamics. Experience breathtaking acceleration as this powerful coupe launches from 0 to 60 mph in a mere 4.4 seconds. The thrill continues as it reaches an electronically limited top speed of 155 mph.
Mercedes-AMG’s engineers achieved these remarkable figures through meticulous application of cutting-edge technology throughout the engine and its supporting systems. Innovative features such as multiple injection and multiple spark ignition for each piston stroke enhance fuel atomization and dramatically improve thermodynamic efficiency, simultaneously contributing to lower exhaust emissions. Further engine highlights include a robust sand-cast aluminum crankcase, a weight-optimized crank assembly featuring a forged steel crankshaft and forged pistons equipped with friction-optimized piston rings. The engine also incorporates NANOSLIDE cylinder lining technology, water-to-air intercooling, intelligent alternator management, and the fuel-saving ECO Start/Stop function.
Advanced Turbocharging and AMG Sport Exhaust for Unrivaled Performance
Mercedes-AMG masterfully tackled the inherent challenges of small-displacement turbo engines by employing a twin-scroll turbocharger, minimizing restrictions within the exhaust system, and implementing an advanced fuel injection strategy. Twin-scroll technology strategically utilizes exhaust gas back pressure, temperature, and momentum to achieve a quicker build-up of boost pressure. This results in a more rapid surge of torque, even from low engine speeds. Beyond performance gains, twin-scroll technology also contributes to improved fuel efficiency and reduced exhaust emissions, showcasing AMG’s commitment to responsible performance. Operating at a peak boost pressure of 26.1 psi, the AMG 2.0-liter four-cylinder turbo engine leads the industry with the highest boost pressure in a production engine, further solidifying its performance leadership.
Complementing the advanced turbocharging system is the AMG Sports Exhaust system, featuring large-diameter pipes and an automatically controlled butterfly valve integrated within the exhaust path. This technology, also utilized in the SLK55 AMG, allows the CLA 45 AMG to produce a distinctive, powerful sound during acceleration, while simultaneously delivering a more refined and subdued tone during sustained cruising speeds, such as on the highway. The engine computer continuously adjusts the valve position based on real-time signals from the gas pedal position and engine speed, ensuring optimal sound output in every driving scenario.
The exhaust butterfly valve amplifies the exhaust note during spirited throttle inputs and gear shifts, enhancing the auditory driving experience. It also generates a particularly pronounced sound during downshifts, thanks to the rev-matching feature, and during full-throttle upshifts, accompanied by a momentary suppression of ignition and injection. Optionally, the AMG Performance Exhaust system elevates the auditory experience even further, producing an enhanced exhaust sound typically associated with engines boasting more than four cylinders, creating an aural sensation that belies its four-cylinder configuration.
High-Performance Cooling System Derived from the SLS AMG GT
The sheer power output of the CLA 45 AMG necessitates a highly effective cooling system to maintain optimal operating temperatures under demanding conditions. Drawing inspiration from the technology employed in the legendary SLS AMG GT, an auxiliary low-temperature cooling circuit is incorporated for water-to-air intercooling of the pressurized intake air. A large radiator positioned at the forefront of the cooling module is supplemented by a secondary radiator located within the wheel well. A high-performance electric pump ensures high coolant flow through the water radiators, strategically positioned behind the large air intakes, and the intercooler itself. This sophisticated cooling system guarantees ideal cooling of the highly compressed intake air, directly contributing to sustained optimum engine performance, even during rigorous driving.
Furthermore, the transmission oil cooling is seamlessly integrated into the engine water cooling circuit, optimizing thermal management and space efficiency. In addition to the main radiator behind the front fascia, a supplementary heat exchanger is mounted directly onto the transmission and supplied with cooling water by an auxiliary pump. This dual-cooling approach ensures consistent and effective temperature regulation for both the engine and transmission, crucial for maintaining peak performance and longevity.
“One Man, One Engine”: Hand-Built Craftsmanship
Echoing the revered AMG philosophy of “one man, one engine,” the new 2.0-liter four-cylinder turbo engine is meticulously hand-built by master engine builders. This artisan approach takes place on an exclusive assembly line dedicated to AMG engines at the Mercedes-Benz engine production plant in Kölleda, Germany. This personalized production process is symbolized by the AMG engine plate, bearing the personal signature of the engine builder responsible for its creation. This plate serves as a tangible representation of AMG’s unwavering commitment to superlative production quality and emphasizes the unparalleled heritage of the Mercedes-Benz high-performance brand. This dedication to hand-built craftsmanship ensures each engine meets the stringent standards of AMG, delivering both exceptional performance and long-term reliability.
AMG SPEEDSHIFT DCT 7-Speed Sport Transmission: Precision and Speed
The drivetrain of the CLA 45 AMG, featuring a dual-clutch transmission and all-wheel drive, stands as a compelling demonstration of engineering excellence. The AMG SPEEDSHIFT DCT 7-Speed sport transmission is directly coupled to the transversely mounted AMG 2.0-liter four-cylinder turbo engine. This advanced dual-clutch transmission in the CLA 45 AMG offers seven precisely engineered gears, three distinct driving programs, a rev-matching function for seamless downshifts, and RACE START for achieving maximum acceleration from a standstill.
Key highlights of the AMG DCT sport transmission include rapid gear shifts executed without any interruption in power delivery, a finely tuned control strategy optimized for performance, exceptionally smooth and effortless gear changes, and a high degree of overall efficiency. Reinforced gears ensure maximum durability under high-stress conditions, while synchronizer rings incorporating carbon-fiber friction linings enhance longevity and optimize responsiveness during manual gear shifts – ideal for demanding driving scenarios and achieving impressive lap times on closed circuits.
“Momentary M Mode”: Enhanced Dynamics and Driving Engagement
Further enhancing the driving dynamics and overall pleasure is the innovative “Momentary M mode.” While operating in the “C” (Controlled Efficiency) or “S” (Sport) shift modes, drivers can instantly engage the “M” (Manual) mode without removing their hands from the steering wheel. This is achieved by simply pressing the “up” or “down” shift paddle once. In “Momentary M” mode, the driver experiences the full dynamic capabilities and performance characteristics inherent in the automatic driving programs, with automatic upshifts only occurring at the engine’s rev limit. This intelligent feature allows drivers to fully concentrate on the vehicle’s impressive performance and the driving experience itself, providing on-demand manual control when desired.
The shift times in manual “M” mode and sport “S” mode are comparable to those found in the high-performance SLS AMG GT super sports car, offering lightning-fast gear changes. Momentary suppression of ignition and injection under full load results in even quicker gear shifts accompanied by a more exhilarating sound, amplifying the sporty character. In “C” mode (Controlled Efficiency), the transmission and engine characteristics are optimized for fuel-efficient and comfortable driving. Furthermore, the ECO Start/Stop function is automatically activated in “C” mode, contributing to further fuel savings and reduced emissions in everyday driving conditions.
AMG Performance 4MATIC All-Wheel Drive: Superior Traction and Dynamics
The development of the standard AMG Performance 4MATIC all-wheel drive system prioritized “performance” and “dynamic spirit.” A compact power take-off unit (PTU), seamlessly integrated into the 7-speed sport transmission, efficiently transfers power to the rear wheels. The PTU shares its lubrication circuit with the transmission, resulting in significant weight savings compared to rival systems that utilize a separate add-on PTU with a dedicated lubrication circuit. Combined with low-friction tapered roller bearings, the PTU achieves exceptional efficiency in power transfer. Notably, the new AMG 4MATIC all-wheel drive system in both the CLA 45 AMG and GLA 45 AMG is up to 25 percent lighter than comparable systems offered by competitors, contributing to improved agility and fuel economy.
A two-part propeller shaft transmits engine power to the rear wheels. To optimize weight distribution and enhance handling balance, a multi-disc clutch is integrated into the rear differential. An electronically controlled hydraulic pump instantaneously compresses the discs, dynamically channeling engine torque to the rear wheels precisely when needed. This sophisticated process occurs virtually imperceptibly to the driver, ensuring seamless transitions between front-wheel and all-wheel drive operation. For rapid response, the hydraulic pump remains continuously active, eliminating any delay in torque distribution when required, unlike some systems that need to be activated each time. The torque split is fully variable; under normal driving conditions, the CLA 45 AMG operates primarily in front-wheel drive for optimal fuel efficiency. However, if the system detects any wheel slippage or increased driver demand for traction, the variable AMG 4MATIC all-wheel drive system intelligently distributes torque between the front and rear wheels, with a ratio of up to 50:50, ensuring maximum grip and control in diverse driving situations. The factors influencing torque distribution include speed differences between individual wheels, vehicle speed, lateral and longitudinal acceleration, steering angle, selected gear, and accelerator pedal position, allowing for highly nuanced and adaptive all-wheel drive performance.
3-Stage ESP® with ESP® Curve Dynamic Assist: Tailored Handling Dynamics
A unique feature of the CLA 45 AMG is the synergistic integration of the 4MATIC all-wheel drive system with the 3-stage ESP® (Electronic Stability Program) and ESP® Curve Dynamic Assist. The three ESP® stages empower drivers to customize the dynamic character of the CLA 45 AMG to their individual preferences at the touch of a button. The default “ESP ON” mode provides maximum stability and neutral handling, intervening by applying braking force to individual wheels to counteract the onset of unstable driving conditions.
A brief press of the ESP® button activates the “SPORT Handling” mode, which delays ESP® intervention and allows a greater proportion of torque to be directed to the rear wheels. This setting provides increased driving enjoyment for those who wish to explore the car’s handling capabilities and push the limits of its performance envelope. Pressing and holding the ESP® button engages the “ESP OFF” mode, intended solely for experienced drivers operating on closed circuits, such as race tracks. Crucially, even in “SPORT Handling” or “ESP OFF” mode, all safety features of the ESP® system remain active and fully functional during braking events, ensuring a safety net is always present.
ESP® Curve Dynamic Assist further enhances the ESP® system’s capabilities. During spirited cornering maneuvers, imperceptible braking is applied to the inside rear wheel, effectively directing more torque to the outside wheels. This subtle intervention results in more precise and confident turn-in of the CLA 45 AMG, improving agility and cornering stability. The behavior of ESP® Curve Dynamic Assist is tailored to each ESP® mode, and in “SPORT Handling” and “ESP OFF” modes, it actively supports the driver’s desire for enhanced agility and dynamic driving performance, without compromising safety. ESP® Curve Dynamic Assist represents a valuable enhancement to the already impressive Electronic Stability Program, noticeably improving both agility and active driving safety, within the boundaries of physical laws.
AMG Sports Suspension: Precision-Engineered Handling
As with every high-performance AMG vehicle, the CLA 45 AMG incorporates sophisticated suspension technology specifically engineered for dynamic driving. To enhance handling responsiveness, the three-link front suspension features stiffer steering knuckles and completely revised elastokinematics. Newly developed, more rigid bearings are employed in the lower link plane to ensure sharper turn-in response and more precise and direct feedback from the road surface. These stiffer bearings also contribute to improved camber stability, enabling higher cornering speeds with enhanced grip and control. The development of the complete front suspension prioritized maintaining optimal traction even under highly demanding, sporty driving conditions.
The CLA 45 AMG’s four-link rear suspension is also a completely new design. To optimize elastokinematics for maximum driving dynamics and control, the suspension bushings were specifically modified. The rear suspension carrier is fitted with more rigid bearings to enhance directional stability, and the subframe is rigidly bolted to the body structure, further increasing chassis stiffness and responsiveness. With its finely tuned spring and shock absorber units and larger stabilizer bars, the AMG sports suspension ensures high levels of lateral acceleration and reduced body roll during rapid transitions, such as fast S-bends, providing exceptional composure and handling prowess. The CLA 45 AMG comes standard with distinctive twin-spoke AMG light-alloy wheels finished in titanium gray with a high-sheen surface, fitted with 235 / 40 R 18 performance tires, providing an ideal balance of grip and ride comfort.
AMG Speed-Sensitive Sports Steering and High-Performance Braking
The electromechanical sports steering system, featuring AMG speed-dependent power assist and a constant steering ratio of 14.5:1, delivers precise and agile steering response across the speed range. The electric motor is directly integrated onto the steering gear, minimizing space requirements and contributing to overall packaging efficiency.
To ensure rapid and reliable deceleration, the AMG high-performance braking system features generously sized, vented and perforated front and rear discs. The front discs measure 13.8 x 1.2 inches, while the rear discs measure 13.0 x 0.8 inches, providing substantial braking surface area and heat dissipation capacity for confident stopping power even under sustained heavy use.
Unmistakable AMG Design: Inside and Out
Even at a glance, the new CLA 45 AMG unequivocally communicates its performance pedigree; the design cues shared with the CLS63 AMG are deliberate and impactful. Mercedes-AMG complements the expressive design language of the CLA with distinctive AMG-specific elements, establishing a new benchmark for sporty aesthetics. The CLA was conceived with inherently sporty proportions, and the AMG “twin blade” radiator grille, along with the cross strut in the AMG front fascia, both finished in matte titanium gray, further accentuate its athletic stance. Large air inlet ports on the sides are framed by black winglets, strategically designed to optimize airflow to the cooling system components positioned behind them. Bi-xenon headlights are included as standard equipment, providing excellent visibility and a modern lighting signature.
From the side profile, the CLA 45 AMG is distinguished by sill panels featuring matte titanium gray inserts, adding a touch of visual dynamism. Further hallmarks of a top-tier AMG model include the twin-spoke AMG light-alloy wheels, finished in titanium gray with a high-sheen surface, and a distinctive “TURBO AMG” badge proudly displayed on the fender. The AMG rear fascia incorporates stylized side air vents, along with a prominent diffuser insert and matte titanium gray trim, further enhancing its sporty and aerodynamic appearance. The conjoined quad-tip chrome tailpipes of the AMG exhaust system serve as a clear visual statement of its performance-oriented purpose. Striking LED tail lights are standard equipment, providing enhanced visibility and a modern rear lighting signature.
The interior of the CLA 45 AMG exudes unmistakable quality, premium materials, and a sporty, exclusive ambiance characteristic of Mercedes-AMG. Standard equipment includes AMG door sill panels, supportive sport seats upholstered in MB-Tex man-made leather and DINAMICA microfiber with contrasting red stitching, red seat belts, a multifunction steering wheel equipped with shift paddles, and an AMG DRIVE UNIT proudly bearing the AMG Affalterbach Crest. The AMG instrument cluster provides essential driving information via a central color display, the AMG main menu, and the RACETIMER function, catering to performance-oriented drivers. Brushed aluminum trim accents on the instrument panel are harmoniously matched with five anodized ventilation nozzles, creating a cohesive and premium interior environment.
Numerous optional features are available for the CLA 45 AMG, allowing owners to further personalize their vehicle and enhance both its aesthetics and performance:
- AMG Exterior Carbon-Fiber package: includes a front splitter, side sill panel inserts, and rear fascia trim crafted from genuine carbon fiber, adding a sporty and lightweight touch.
- AMG Carbon-Fiber Interior trim: extends the carbon fiber theme to the interior, enhancing the sporty and exclusive ambiance.
- AMG 19” 16-Spoke Alloy Wheels: available in 8 x 19 size with 235 / 35 R 19 tires, finished in titanium gray with a high-sheen surface or painted matte black with a high-sheen rim flange, offering enhanced aesthetics and handling.
- AMG Night Styling: incorporates black anodized beltline trim strips, tailpipes with a black-chromed finish, radiator grille blades in silver chrome, gloss black painted front splitter, exterior mirrors, side sill panel inserts, and rear fascia trim, creating a more aggressive and stealthy appearance.
- AMG Performance steering wheel: enhances driver feel and control with premium materials and ergonomic design.
- AMG Performance seats by Recaro: offer enhanced lateral support and sporty aesthetics for ultimate driving enjoyment.
- AMG wheel center caps: (for 18-inch AMG light-alloy wheels only) add a subtle AMG detail.
- Red painted calipers: provide a visual pop of color behind the wheels and further emphasize the vehicle’s sporty character.
- AMG Driver’s Package: combines AMG Performance Suspension for enhanced handling, 19-inch AMG Alloy Wheels for improved aesthetics and grip, Red Brake Calipers for a sporty visual cue, and an increased top speed of 167 mph, unlocking the car’s full performance potential.
- AMG Performance Exhaust: elevates the auditory driving experience with a more aggressive and resonant exhaust note.
The 2015 Mercedes-Benz CLA 45 AMG 4MATIC Coupe stands as a testament to AMG’s relentless pursuit of performance and innovation, delivering a thrilling driving experience in a stylish and sophisticated package.
