The M550d xDrive is the highest diesel-engined model, and was produced in sedan and Touring body styles. It was a launch model for the "M Performance" sub-brand – alongside the X5 M50d and X6 M50d – at the 2012 Geneva International Motor Show.[95] The M550d is powered by the N57S triple-turbo straight-6 diesel engine. The N57S produces 280 kW (380 bhp) and 740 N⋅m (550 lb⋅ft), resulting in a claimed 0 to 100 km/h (62 mph) acceleration of 4.7s (4.9s for the Touring). The transmission is a ZF 8HP 8-speed automatic and all models are all-wheel drive ("xDrive").