Mercedes-Benz SLS AMG Black Series

The 2014 SLS AMG Black Series doesn’t have a straight-eight, but it does have the most potent 6.2-liter V-8 ­Mercedes-Benz has ever built. This is likely the last naturally aspirated gasp of the brand’s heavy-breathing M159 engine we’ll ever hear. AMG has given the engine new camshafts, specially coated bucket tappets, a more efficient intake […]