The M6 boasts the same muscular hand-built 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 shift 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.The BMW M6 carries over with minimal changes for 2010. Both the coupe and convertible are now outfitted with digital HD Radio, while the next-generation iDrive system includes a new internal hard drive-based navigation unit.