We didn’t formerly road test the recent Mercedes-AMG C 63 coupé, on account of the fact that we’d already tested the saloon and were hoping that an even more extreme Black Series version might come along at some point, and therefore doing so might prove to be AMG overkill.

However, there’s something quite compelling about AMG at the moment, and the roll Mercedes’ performance division is on makes the C 63 S Cabriolet worthy of your, and our, attention.

Besides, we haven’t road tested a current C-Class Cabriolet yet, so this model represents an intersection of what the two separate labels stand for.

The Mercedes-Benz C-Class Cabriolet is a comfortable, confident four-seat convertible, but one not noted at most points within its range for being a sports car.

The C 63, meanwhile, is something else: a confident four-seater, certainly, but one that gives over so much to driving pleasure that comfort drops down the list of its priorities and abilities.

Which makes you wonder: how far can you stretch, in any direction, the C-Class and AMG characters, and do they still meld when you try?

Let’s hope so, because the arrival of the C 63 Cabriolet takes the total number of C-Class derivatives with AMG elements in the mix to 12, across saloon, estate, coupé and convertible body styles, although many of those use the lesser twin-turbo V6 engine and are badged C 43. It’s a car we like a great deal, but it stops some way short of offering the full AMG experience.

The C 63 Cabriolet ought to be something else again, then, what with it having the segment’s only twin-turbo V8 engine, says AMG, proudly.

A BMW M4 Convertible gets by with a twin-turbo straight six, it’s true, but we’re prepared to squint a bit and forget that the Jaguar F-Type R doesn’t have rear seats – but it does have a V8, albeit supercharged.

The C 63 Cabriolet is alone among the three, however, in having more than 500bhp, at least in S form. Whether that’s enough to make it the most compelling car in the segment is what we’re here to find out.

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