It seems that Mercedes has accidentally revealed the 2014 S63 AMG in one of the official production promo videos for the new S-Class. Immediately notice the AMG type alloys, the V8 bi-turbo lettering on the side and of course the label on the back (duh). I hope they make it look a little more aggressive than this because it is not AMG enough for me. We can expect about 557hp from the 5.5-litre V8 twin-turbo engine and maybe about 585hp from a S-Model like the E-Class.