Mercedes has been spotted testing its forthcoming AMG GT R in the snow ... which appears (from the penetratingly illuminated nighttime shots especially) to borrow more heavily from the competition ...

The folks over at Mercedes-AMG call the GT 63 S E Performance 4-Door a coupe, but our eyes see four doors. We're willing to ...

Mercedes engineers have been busy ... wagon will be powered by a 457hp hand-built 6.2L AMG V8 developing peak torque of 600Nm. The spy shots reveal the new C63's bonnet power bulge, pumped wheel ...

This effort is all Mercedes, though, and may even be badged AMG-only. The reborn Gullwing is likely to use a V8 or V10, with upwards of 550bhp - enough to scare most super coupes into submission ...