For most people, the standard Mercedes-Benz C63 AMG sedan with its 6.2-liter V8 that generates 457HP and 600Nm (443 lb-ft) is more than a handful, but for those that drooled over the C63 AMG Coupe Black Series edition and wished it would be offered with four doors, we have some very good news for you.

Our spies stumbled upon a prototype version for the C63 AMG Black Series edition in sedan form while testing on the demanding Nürburgring racetrack. This test mule featured widened wheel arches housing larger wheels plus the same modified front and rear bumpers seen on the Black Series coupe.

The production model will also sport different side skirts, blacked out mirror caps, 10-spoke alloy wheels and a vented hood.

Like its two-door sibling, the C63 AMG sedan Black Series edition will get an upgraded version of the base car’s naturally aspirated 6.2-liter V8 engine delivering at least the same 517-horses and 620 Nm (457 lb-ft).

Expect a 0-100km/h (62mph) sprint time in the low 4’s while top speed is likely to be electronically governed at around 300km/h (187mph).

The V8’s output will be channeled to the rear wheels through a seven-speed dual-clutch AMG Speedshift transmission.

AMG engineers will also make changes to the sedan’s suspension and brake systems while a electronically limited-slip differential will come as standard.

Look for the ultimate C63 AMG sedan to make its debut within the next year.

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