The M6 boasts the same muscular 500 hp 5.0-liter V10 engine as the M5, along with enhanced suspension and brakes. A 7-speed Sequential Manual Gearbox (SMG) with steering wheel paddles is standard; a conventional 6-speed manual transmission is also available. Both the coupe and convertible are built using lightweight aluminum, carbon fiber and composite materials, allowing the M6 an excellent power-to-weight ratio. Distinguishing standard features include exclusive M designed 19-inch forged alloy wheels, heated leather M sport front seats and BMW's M Drive button on the steering wheel to save and retrieve preferred driving settings. For 2008, the BMW M6 receives a minor exterior refresh, with a revised headlight design, LED turn signals and a more pronounced rear trunk lip. New options for 2008 include a heated steering wheel and High-Beam Assistant autodimming headlamps.