More than just a two-door version of the C63 AMG sedan, the Coupe has a unique platform that better takes advantage of its glorious twin-turbo V8.

WHAT IS IT? Mercedes-Benz’s answer to the BMW M4 and Audi RS5. It’s also the fastest, most focused C-Class ever produced. The basic silhouette is shared with the regular C two-doors, but the footprint is broader for more stable high-speed dynamics.

WHY WE’RE TESTING IT This is our first Australian wheel-time in the new C63 AMG Coupe, which was available for a few hot laps at Sydney Motorsport Park.

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THE WHEELS VERDICT It’s the most accomplished C yet and the Coupe brings new-found cornering confidence to the C63 AMG equation. More than ever, the choice between the C63 Coupe and sedan will come down to a lot more than practicality.

PLUS: Wider footprint makes for more attentive handling; glorious V8; elegant interior MINUS: Heavier than the four-door; not convinced about the look from the rear

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Because a single tenth is the difference in the claimed 0-100km/h time for Benz’s new C63 S Coupe compared with its four-door sibling. The triple-figure target comes up in 3.9 seconds, compared with 4.0 seconds for the four-door.

A miniscule difference, but an important one in an era when bragging rights count – and when shaving anything off the acceleration time of one of the quickest sub-$200K cars on the market can mean masses of kilowatts and lots more money.

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So put its perkier punch down to rubber. There’s more tyre and each is splayed further apart. Up front the difference is minimal; the Coupe’s 255mm-wide 19s are a mere 10mm wider than those of the sedan. But out back the C Coupe comes with massive 285mm 20s, which are 20mm wider and an inch up in diameter on the four-door.

Our first local taste test of the C Coupe was at Sydney’s Eastern Creek track (or Sydney Motorsport Park). And it’s the revised suspension geometry of the Coupe that is most obvious the moment you tip into a bend. The front wheels sit 48mm further apart that those in the sedan, the rears 22mm.

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And there’s enough thrust to coax the tail into a thoroughly predictable slide if you link things up right.

It’s the predictability of the C Coupe that impresses most. While it has the pace to crank out some deceptively brisk laps, you can clock them without having to try too hard.

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Aficionados will appreciate the unique body, too. Pumped guards front and rear (adding 64mm and 66mm of width respectively) make for a muscular stance, albeit with a tapering tail that isn’t to all tastes.

If passengers aren’t your thing – the twin back seats are tight for head room – the C Coupe is a delicious step up from the sedan it shares an engine and most of its interior with. And for only $5000 more than the four-door.

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