Spied- Mercedes SLS Black Series

Mercedes is working on a hardcore 208mph Black Series version of its SLS AMG supercar. It will go on sale in 2013, costing around 50 per cent more than the £168,395 coupe. It will have a 0-62mph time of 3.5sec and a top speed of 208mph. Power of around 600bhp and 500lb ft is expected in the Black Series