There are AMG fans for whom our V12 biturbo engine is the measure of all things.
We're not sure it's just a coincidence this car appears the day after Germany lifted the World Cup. But whatever: Be afraid. It now takes its rightful place at the top of the S-Class Coupe tree, featuring as it does a monster 6-litre twin turbo V12 engine powering the rear wheels.
And that engine is quite something, too. It's the most powerful to be fitted to an S-Class Coupe, with 630 horsepower and a whopping 737 pound-feet of torque (a nice, round 1000 Newton-metres). Notable features include an aluminium crankcase, a forged crankshaft in high-grade alloy steel, a carbon fibre engine cover and even that little engine plate bearing the name of the artisan who built it.
There is a seven-speed AMG automatic gearbox somewhere between engine and furious tire-squealing, too, with three modes (efficiency, sport and manual). All in, the forces at work conspire to propel this S65 from 0-62mph in 4.1 seconds (0.2sec quicker than the S65 saloon but slower than the 577hp S63 Coupe), and a limited top speed of 155mph.
There's also Mercedes' fancy new toys in the shape of Magic Body Control (that scans the road ahead and adjusts the suspension to compensate) and Curve Tilting, which actively leans the car in during cornering. As we found on the S63 Coupe, it's great.
There are huge composite brakes (ceramic discs are optional). There are 20-inch forged alloy wheels. There's high-sheen chrome at the front, sides and rear, a new front splitter, ‘V12 Biturbo’ lettering on the fenders and, of course, the twin exhaust pipes at the back.
It's exquisite inside, too: AMG leather with a diamond pattern, AMG sport seats developed for long-distance comfort, leather on the headliner, dashboard top and door panels, and a new three-spoke steering wheel. There's even a heads-up display and touchpad.
"There are AMG fans for whom our V12 biturbo engine is the measure of all things," explains AMG chief Tobias Moers. The S65 AMG Coupe rolls into dealerships late this year. Prices have yet to be announced.
Which would you have? S63 Coupe, S65 sedan or this new Coupe?
This story originally appeared on TopGear.com.
If you would like to comment on this story or anything else you have seen on BBC Autos, head over to our Facebook page or message us on Twitter.