The Mercedes-AMG GT C Roadster has been spied doing testing on public roads in Europe.

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Unlike earlier spy photos of the AMG GT convertible, this latest set shows the company's pre-production prototypes in all their high definition glory.

Not just that, but we get to see the upcoming roadster from all angles. Up front, the new convertible sports what looks to be an unaltered face.

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From the side and the back we can see that the GT C Roadster will feature a folding fabric top with an integrated rear glass windscreen.

Despite featuring all new the panels from the windscreen back, the overall design is very much in keeping with the coupe's, although the GT C does feature a vent near where the boot lid meets the rear bumper.

A product roadmap included with last week's half-yearly sales results presentation confirmed that the convertible will go on sale in 2017. The open-top AMG GT will be branded as the GT C Roadster, and will be followed later in the year by a GT C coupe sibling.

If the GT C Roadster gets the green light for sale in Australia, it will likely land here in the second half of 2017.

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It's not entirely clear how the GT C models will differ from the existing GT coupe and GT R coupe, but it might feature a slightly revised drivetrain.

As with the other models in the AMG GT range, AMG's 4.0-litre twin-turbocharged V8 engine will reside underneath the long bonnet.

The base GT uses a 340kW/600Nm version of the engine, the GT S employs the 375kW/650Nm variant, and the recently unveiled GT R not only has a lower kerb weight, but extracts 430kW/700Nm from the engine.