By Anthony Horner · Founder of FastTrack

Mercedes-AMG CLE 646: 0-60, Specs & Price

The Mercedes-AMG CLE 646 Spezialanfertigung does 0-62 mph (0-100 km/h) in a claimed 3.9 seconds, 0-124 mph (0-200 km/h) in 11.4 seconds, and tops out at 193 mph (310 km/h). Power comes from a heavily reworked 4.0-liter V8 biturbo — now with a flat-plane crankshaft — making 646 PS (637 hp SAE) and 627 lb-ft (850 Nm), sent exclusively to the rear wheels. Revealed on September 10, 2026, it is the second car in Mercedes-Benz's ultra-exclusive Mythos series, limited to 30 hand-built units — and per Hagerty, all 30 are already spoken for. Mercedes has not published a price.

That 3.9-second claim is slower than plenty of cars costing a tenth as much, and that's the point: the CLE 646 deletes all-wheel drive, the rear seats, and most of the sound insulation to build a road-legal track coupe, not a drag racer. Here is every number AMG has actually stated, and what they mean in the real world.

Mercedes-AMG CLE 646 Specs at a Glance

Powertrain, weight-reduction, track-width, and acceleration figures come from Mercedes-AMG's own material; the 3.9-second 0-62 claim and 1,895 kg kerb weight are as reported by Autocar from the reveal, with Hagerty and Motor1 corroborating the output and production numbers. No independent instrumented test exists yet.

How Fast Is the Mercedes-AMG CLE 646 0-60?

AMG quotes 3.9 seconds to 62 mph using a launch control system calibrated specifically for rear-wheel drive. Mercedes only publishes the metric figure, so a true 0-60 mph number would land fractionally under 3.9 seconds — but there's a more honest way to read this spec sheet.

Rear-drive cars with 627 lb-ft are traction-limited off the line, full stop. AMG's own C 63 S E Performance sedan — with less peak torque but all-wheel drive — claims 3.3 seconds. The CLE 646 gives that away deliberately, because the 0-200 km/h time is where the deleted weight shows up: 11.4 seconds to 124 mph is deep into supercar territory, quicker relative to its 0-62 than almost anything traction can explain. Manufacturer numbers are also typically set on prepped surfaces, and our breakdown of real-world 0-60 times versus manufacturer claims shows high-torque RWD cars are the most sensitive layout of all — expect GPS-measured street launches a few tenths adrift of the brochure.

No quarter-mile claim has been published, and nobody outside AMG has strapped timing gear to one yet. With 637 hp pushing 4,178 lb, our power-to-weight calculator puts it at 6.6 lb/hp — around Porsche 911 Turbo levels — which suggests a mid-11-second pass once traction is sorted. That's an estimate; we'll update when verified numbers exist.

A Flat-Plane Crank AMG V8 Is the Real Headline

The M177 4.0-liter biturbo has powered everything from the C 63 to the GT, but always with a cross-plane crankshaft. For the CLE 646, AMG fitted a flat-plane crank — the configuration Ferrari uses in the 296 and Ford used in the Mustang GT350 — which reduces rotating mass, sharpens throttle response, and fundamentally changes the engine's character and sound. Combined with the titanium Akrapovič-developed exhaust, this is a different animal from any other M177 application.

The 646 PS output gives the car its name, and torque is a wide 850 Nm plateau from 2,500 to 4,500 rpm. Shifting runs through AMG's SPEEDSHIFT TCT 9G nine-speed rather than a dual-clutch, with rev-matching logic tuned for the flat-plane engine's faster-spinning behavior.

Built Like a Race Car: What the 170 kg Deletion Buys

Per Mercedes-AMG, the Spezialanfertigung treatment cuts roughly 170 kg (375 lb) from the production CLE through carbon-fiber body panels, polycarbonate-adjacent glazing choices, deleted rear seats, stripped acoustic insulation, carbon door panels, and racing bucket seats. A bolted-in roll-over bar adds back rigidity, and the bodyshell is reinforced and widened 60 mm at both axles for wider wheels and tires.

The chassis hardware reads like a customer race program: steel coilover suspension with four-way adjustable dampers (independent low- and high-speed compression and rebound), ceramic composite brakes with a redesigned cooling system, and a manually adjustable front diffuser with Street and Race positions — the Race setting uses the Venturi effect to add front-axle downforce. The electronically controlled rear differential is even calibrated to support controlled drifting. Where horsepower is the spec-sheet number, weight is the one that shows up in every measurement — our 0-60 times by horsepower analysis covers why power-to-weight predicts acceleration better than power alone.

How the CLE 646 Compares to 2026's Other Limited-Run Cars

The CLE 646 lands in a year crowded with sold-out, limited-production statements. Aston Martin's 838-hp Valen plays the same front-engine, rear-drive card at 150 units and roughly $2M. Electric flagships like the Mercedes-AMG GT 4-door EV more than double the CLE 646's output and halve its 0-60 — and none of them will sound remotely like a flat-plane V8 at 7,000 rpm. Against the outright field in our fastest cars of 2026 ranking, a 3.9-second claim doesn't register; as a driver's coupe with a one-of-30 engine configuration, it doesn't need to.

If one of the 30 owners ever wants the honest number, FastTrack's GPS timing will measure what a 627 lb-ft rear-drive launch actually does on unprepped pavement — historically the more interesting figure for cars like this.

FAQ

What is the Mercedes-AMG CLE 646's 0-60 time?

Mercedes-AMG claims 0-100 km/h (0-62 mph) in 3.9 seconds with rear-drive-calibrated launch control, and 0-200 km/h (0-124 mph) in 11.4 seconds. No independent instrumented test has been published yet. The true 0-60 mph figure would be marginally quicker than the metric claim.

How much horsepower does the Mercedes-AMG CLE 646 have?

646 PS (637 hp / 475 kW) and 627 lb-ft (850 Nm) of torque from 2,500–4,500 rpm, from AMG's M177 EVO 4.0-liter V8 biturbo — fitted, for the first time in this engine family, with a flat-plane crankshaft.

How much does the Mercedes-AMG CLE 646 cost?

Mercedes-AMG has not announced a price. Only 30 units will be hand-built in Affalterbach as part of the Mythos series, and per Hagerty all 30 are already allocated, so the sticker is largely academic.

What is the Mythos series?

Mythos is Mercedes-Benz's ultra-exclusive limited-run sub-brand, reserved for its most collectible builds and offered only to selected collectors. The CLE 646 Spezialanfertigung is the second Mythos model, following the speedster-style Mercedes-AMG PureSpeed.

Is the Mercedes-AMG CLE 646 all-wheel drive?

No. Unlike the 4MATIC+ AMG mainstream models, the CLE 646 is exclusively rear-wheel drive to save weight and sharpen its balance, with an electronically controlled limited-slip differential and launch control calibrated specifically for two driven wheels.

What's different about the CLE 646's engine?

It's the familiar AMG 4.0-liter V8 biturbo (M177 EVO), but with a flat-plane crankshaft instead of the usual cross-plane design — reducing rotating mass for sharper response and a higher-pitched, race-car soundtrack through a titanium exhaust developed with Akrapovič.