The three-pointed star's performance coupe has been spotted again, ahead of a likely debut next year.
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Photographers have snapped images of a prototype believed to be the upcoming Mercedes-AMG GT R Black Series this week, during hot weather testing in sunny Europe.

Talk of a 'Black Series' version of the AMG GT coupe has been swirling for some time now, and this development vehicle doesn't look far off production.

Based on the already wild AMG GT R, the Black Series gets a revised front bumper with rejigged intakes and a new bonnet intake – feeding plenty of air to an even more powerful version of the company's now ubiquitous 4.0-litre bi-turbo V8.

In the GT R and GT R Pro, that motor makes 430kW and 700Nm. The rumour mill is suggesting a power figure of around 700hp (522kW) is a possibility.

Should that turn out to be true, it'd be the most powerful version of AMG's staple V8 engine that we've seen thus far. The current output king is the tune in the AMG GT63 S 4-door, which develops a meaty 470kW and 900Nm.

At the rear, the changes are also pretty subtle, with the most noticeable difference being the quad-tipped exhaust rather than the large central unit on the GT R.

In terms of timing, it's believed the AMG GT R Black Series will make its debut sometime in 2020, perhaps at the Geneva motor show in March.

From there, sales will likely kick off in Europe a few months after the car's debut, while Australia will likely have to wait until late in 2020 or very early in 2021.

Stay tuned to CarAdvice for all the latest, and click on the images for the full gallery.