Powered by a 5.6-liter, 420 horsepower V8 engine with Direct Gasoline Injection, the all-wheel drive M56x is matched with a seven-speed automatic transmission with manual sport shifting. A variable valvetrain is included for improved power and economy; and INFINITI Drive Mode Selector and Hill Start Assist are there to help deal with varying road conditions. Climate-controlled leather front seats with 10-way power adjustment and power lumbar are standard. Safety features include six airbags, front seat active head restraints, individual tire pressure monitor, and rearview monitor. The M56x features Vehicle Dynamic Control stability control, traction control, advanced ABS brakes, Bose Premium audio, bi-functional (HID) xenon headlights, and a hard drive navigation system with XM NavTraffic. Available features include Bose Studio Surround Sound.The INFINITI M56x is a carryover for 2012.