Mercedes-Benz is close to coming up with the SLS AMG Black- the hottest-ever version of the popular supercar. The fastest street legal SLS was recently caught testing at the Nürburgring Nordschleife circuit. The Black Series Edition of the AMG will come with a 6.3-liter V8 motor that will pump out very healthy 650 horses and will also feature a wide body kit, lightweight carbon fibre panels, quicker transmission, a stiffened suspension. uprated brakes and new steering system. The car should be unveiled towards the end of this year with sales starting from early 2013.