The Mercedes-AMG S65 Cabriolet continues AMG's long-standing tradition of shoving huge amounts of horsepower into an otherwise sedate luxury vehicle.

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This time, the madmen at AMG took an ordinary S-Class Cabriolet and added a 6.0-liter, twin-turbocharged, 12-cylinder engine.

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The S65 Cabriolet will put out 630 horsepower and 738 pound-feet of torque.

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There is no all-wheel-drive option for the S65 Cabriolet -- it's rear-wheel drive or nothin'.

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Power makes its way from engine to wheels by way of a seven-speed automatic transmission, specifically engineered to handle the V12's immense torque output.

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Green-minded enthusiasts will be pleased to know that the S65 Cabriolet comes with stop-start technology to cut down on emissions and wasted gas at idle.

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The S65 doesn't look that much different from the standard S-Class Cabriolet, until you take notice of the "V12 Biturbo" badges on the front fenders.

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The S65 Cabriolet also features a heapin' helpin' of chrome exterior trim, starting up front with the air splitter and going all the way back to the hallmark AMG quad tailpipes.

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As with other S-Class Cabriolets, the S65 Cabriolet features a power-operated soft top available in four colors -- dark blue, dark red, black and beige.

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The S65 Cabriolet's soft top can open and close in 17 seconds, at speeds up to 31 mph.

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To keep its occupants toasty on long top-down rides, the S65 Cabriolet comes with both Aircap, which deflects air over the top of the windshield cowl, and Airscarf, which utilizes seat-mounted heat vents to keep necks and heads warm.

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If safety is a concern, the S65 Cabriolet can be had with the brand's Distronic Plus suite of safety equipment.

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Combining features like adaptive cruise control, active lane-keep assist, active blind-spot monitoring and more, Distronic Plus can practically drive the car itself, in situations ranging from traffic jams to open highways.

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The interior is largely the same as the standard S-Class Cabriolet, save for standard sport seats and a three-spoke steering wheel.

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The seats are finished in nappa leather, and the soft top is lined with microfiber.

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European buyers can order an S65 Cabriolet starting in April 2016, with deliveries following in May. There's no official word on a US release, but we'd bet dollars to doughnuts that it'll arrive in the US a few months after its European launch.

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There's no word on pricing, but for a bit of context, the fixed-roof Mercedes-AMG S65 Coupe currently starts at $234,050, £181,305 or AU$499,000, depending on your market.

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