Mercedes-Benz revealed the new S-Class a two weeks ago in Hamburg.
Here we have the latest and best spy shots showing the hot S63 AMG in less camouflage testing on the Nürburgring race track.
The front camouflage is hiding a new bumper with bigger air intakes and at the rear we can see the familiar AMG style two exhausts at each side, as well as a revised bumper. Also the prototype reveals us bib brakes behind new AMG wheels.
Power is expected to come from a new M157 twin-turbo 5.5-litre V8 engine with around 570bhp.
World debut is most likely in September at the Frankfurt Auto Show.