What appears to be an upcoming AMG GT S E Performance has been spotted out in Sweden during cold weather testing, and several things have caught our eye - in particular, the fixed rear wing and the wheel hubs. The fixed rear wing likely won't be a base model feature, so this, along with obscured badging, could mean it's a special First Edition model we are looking at.

The AMG GT S E Performance also looks to have a charger port in the rear bumper and quad-squared exhaust pipes, as does the AMG GT 63 S E Performance. If that is, indeed, the 4.0-liter twin-turbocharged V8 with a hybrid assist from an electric motor to the rear axle, it would also give the S E Performance version the same 831 horsepower and up to 1,084 lb-ft of torque. And this brings us to those wheel hubs.

That kind of power and the icy conditions the car is being tested in gives credence to our suspicion the wheel hubs mean the AMG GT S E Performance will be all-wheel-drive. Between the drivetrain options, rear seats, and all-wheel-drive as a likely option, that will put the AMG GT as a close competitor to the Porsche 911.

It's also apparent that the new AMG GT S E Performance has a longer wheelbase than the outgoing generation. It supports a 2+2 seater layout, unlike the current generation AMG GT. The new model is designed alongside the Mercedes SL platform. Other rumors include a multitude of powertrain options, and it's all but confirmed the entry models will use a turbocharged four-cylinder with hybrid assist to make 671 hp and 752 lb-ft.

Mercedes doesn't appear to be too shy about the car, and it's showing itself with minimal camo and what looks like Alpine Gray paint from the brand's Manufaktur selection. We also like the aggressive rear diffuser sitting between the split-quad exhaust pipes. Other significant clues this is the AMG GT S E Performance include the big brakes, black wheels, and Panamericana grille with more air inlets underneath.

Given that Mercedes isn't hiding the car with much guile, the AMG GT S E Performance probably isn't far away from an official debut, so we're thinking around six months before the German automaker pulls off the covers.