AUTONEWS

Mercedes-AMG CLE 646 Spezialanfertigung

The Mercedes-AMG CLE 646 Spezialanfertigung was developed with a single, clear focus: driving dynamics. This high-performance, road-legal coupé delivers an uncompromising driving experience on winding roads and closed race tracks.

To achieve this, the vehicle combines a 646 hp (475 kW) V8 biturbo engine with exclusive rear-wheel drive, significantly reduced weight, and a chassis configuration engineered specifically for precision.

A unique wide-body concept—featuring a wider track, numerous carbon-fiber components, and purpose-built aerodynamics—further enhances the vehicle's dynamic potential. To realize this, every unit of the CLE 646 "Spezialanfertigung" (special build) undergoes extensive modification at AMG headquarters in Affalterbach, adhering to the highest standards of hand-crafted production.

At its heart lies the significantly upgraded AMG M177 EVO 4.0-liter V8 biturbo engine. Its 646 hp (475 kW) output is reflected in the model's designation. Peak torque stands at 850 Nm, available across a broad engine speed range of 2,500 to 4,500 rpm.

One of the most significant modifications concerns the drivetrain. The AMG Performance 4MATIC+ system from the original vehicle has been completely removed, meaning the CLE 646 Spezialanfertigung transmits power exclusively to the rear axle. Switching to rear-wheel drive reduces weight while fundamentally altering the car's dynamic character. An electronically controlled rear limited-slip differential optimizes torque distribution between the rear wheels via variable locking rates, depending on requirements. This enhances traction, driving stability, and overall vehicle dynamics. Under appropriate driving conditions, the system also enables controlled drifting.

The standard AMG SPEEDSHIFT TCT 9G transmission delights performance-oriented drivers with its dynamic gear-shifting characteristics and an emotive rev-matching function. Depending on the selected drive program, it delivers either sporty, rapid gear changes or exceptionally smooth, almost imperceptible shifts. The AMG SPEEDSHIFT TCT 9G transmission also combines efficiency with dynamic performance.

The transmission's overall character can be tailored via the AMG DYNAMIC SELECT system, which offers a range of drive programs with specific powertrain settings.

The Launch Control system in the Mercedes-AMG CLE 646 Spezialanfertigung has also been specifically adapted for the rear-wheel-drive configuration. This new model from the Mythos series accelerates to 200 km/h in 11.4 seconds. Its top speed is 310 km/h.

The suspension system has also been specially optimized for the Mercedes-AMG CLE 646 Spezialanfertigung, having been jointly developed by Mercedes-AMG and KW automotive. The configuration allows for extremely precise adjustment based on driving style, track characteristics, personal preferences, and the vehicle's intended use. The high-performance AMG ceramic composite braking system is engineered for extreme loads and delivers consistently high braking performance, even during intense track driving. On the front axle, 420 x 40 mm ceramic brake discs are paired with six-piston fixed calipers. On the rear axle, the system features 360 x 32 mm ceramic brake discs.

Compared to a conventional braking system, this configuration reduces overall weight. This directly contributes to improved driving dynamics and more precise turn-in response. Gold-painted brake calipers further underscore the high-performance nature of the system.

The bodywork has been designed entirely with a focus on maximizing driving dynamics and performance. A comprehensively modified body structure increases rigidity and forms the foundation for the vehicle's exceptional performance potential. Numerous standard components have been replaced by solutions specifically developed for demanding road and track use. A key element of the concept is the vehicle's significantly wider stance; to achieve this, the bodywork has been reinforced and widened. The result is an increase in vehicle width of 60 millimeters at both the front and rear. The wider track improves stability, enhances cornering potential, and allows for the use of exceptionally wide wheels and tires. Carbon fiber has been used for the widened front fenders with integrated air vents, the redesigned front bumper featuring large cooling air intakes, the side skirts, the hood with a central cold-air intake, the roof, and a newly developed rear bumper with a diffuser. The reinforced trunk lid and the manually adjustable rear wing—mounted on two trapezoidal supports—are also made of carbon fiber. The rear side windows and the rear window are made of polycarbonate, while a lighter 12-volt starter battery further contributes to reducing the overall weight.

The interior reflects the same unwavering focus on lightweight construction and driving dynamics. The rear seats and sound-insulation materials have been removed. Comfort features have been minimized, and the audio system simplified to save weight. Omitting certain driving modes and driver-assistance systems also allowed for a reduction in the number of controls on the AMG Performance steering wheel. Featuring DINAMICA microfiber upholstery and a flat-bottomed shape inspired by motorsport, the steering wheel offers exceptional control.

Ultra-lightweight, high-performance racing seats with pronounced lateral support come as standard, alongside a roll-over bar that increases torsional rigidity and further enhances driving dynamics. Lightweight carbon-fiber door panels complete the interior. As part of the optional Performance package, six-point seatbelts firmly hold the driver and front passenger in place.

Vehicle ride height has also been optimized for performance, with the vehicle lowered by 22 millimeters at the front axle and 16 millimeters at the rear.

To strike the best balance between everyday usability and track performance, the front diffuser can be manually adjusted to one of two positions—"Street" or "Race"—using three fasteners, with the latter setting intended exclusively for track driving. When set to the "Race" position, the front diffuser creates a specific aerodynamic profile beneath the vehicle's front end. Its shape, resembling an inverted wing, accelerates airflow under the car and generates a Venturi effect, thereby increasing downforce on the front axle. The benefits are immediately apparent in the steering response; the Mercedes-AMG CLE 646 Spezialanfertigung remains exceptionally precise and stable at high speeds, while offering agile turn-in and clear steering feedback under high lateral loads. In conjunction with the extended front diffuser, the center section of the carbon-fiber rear spoiler can be manually adjusted to further increase rear-axle downforce during track driving and achieve the desired aerodynamic balance.

Designed for use on closed circuits with ESP deactivated, the AMG TRACTION CONTROL system allows drivers to individually adjust the level of support when managing high engine power, without intervention from the ESP stability system. The system offers precise adjustability, allowing for a configuration tailored to tire temperature and the driver's desired proximity to the handling limits. Specially calibrated for the Mercedes-AMG CLE 646 Spezialanfertigung, AMG TRACTION CONTROL allows the driver to choose from nine levels of permissible wheel slip on the driven rear axle. In pursuit of a more direct driving experience, the number of infotainment functions and other features has been reduced. Consequently, the CLE 646 Spezialanfertigung dispenses with numerous comfort and driver-assistance systems, including the PARKTRONIC parking aid.

Each vehicle is handcrafted in Affalterbach based on the CLE 53 platform. This continues the long AMG tradition of exclusive hand-craftsmanship, responsible for creating legendary models such as the AMG 300 CE 6.0 "The Hammer."

The Mercedes-AMG CLE 646 Spezialanfertigung is the second model in the ultra-exclusive Mercedes-Benz Mythos series, dedicated to rare collector's vehicles produced in strictly limited numbers. Following the Mercedes-AMG PureSpeed—produced in a global run of just 250 units and featuring an open-top, two-seater configuration without a roof or windshield—the Mercedes-AMG CLE 646 Spezialanfertigung now joins the series. Street-legal and produced in a limited run of only 30 units, this vehicle places an uncompromising emphasis on track performance. Combining striking looks, top-tier performance, and an exceptionally direct driving experience, the model has become a highly coveted product—so much so that it sold out even before its world premiere.