It was inevitable. Mercedes-AMG has started testing a more track-focused version of the already mental C 63 Coupé. The prototype, which apparently was incredibly fast around the Nürburgring where our spy spotted it, will be the halo model in the C-Class range sitting above the C 63 S. This is in line with what Mercedes has done with the AMG GT range.

While there are some chances of the Black Series name returning, the alphabet ‘R’ seems to be the one to denote AMG’s pinnacle of performance — our bet would therefore be on the latter.

Cosmetically, apart from the hard-to-miss humongous fixed spoiler at the rear and a new front splitter, there is little that has changed. The big news will be under the bonnet, though.

The current C 63 S makes 503bhp from its twin-turbocharged 4.0-litre V8, and we’d wager that the R will make more. Something in the region of 550 horsepower seems perfectly logical. The car will likely also get four-wheel steering from the GT R, and be given AMG’s new-found obsession with handling rather than hooning, and an optional four-wheel drive version will also be available. Power will still be transmitted via a seven-speed dual-clutch gearbox, presumably set-up for more aggressive shifts than in the S variant.

You can officially consider us excited now.