The base G37 comes standard with 17-inch alloy wheels (18s on the coupe), xenon headlights, keyless ignition and entry, automatic climate control, leather upholstery, full power accessories, a power driver seat, a tilt-and-telescoping steering wheel and a six-speaker audio system with a CD/MP3 player, satellite radio and an auxiliary audio jack. In keeping with modern trends, the G37 convertible has a retractable hardtop that stows beneath the trunk lid in less than 30 seconds. The Journey trim level adds automatic headlights, dual-zone climate control, a six-CD changer and a power front passenger seat. Stepping up to the G37x all-wheel-drive model adds heated front seats and outside mirrors. The Premium package includes a sunroof, rear park assist, a power tilt-and-telescoping steering wheel, driver memory settings, Bluetooth, an upgraded Bose audio system (of which the convertible gets a purpose-built version with headrest-mounted speakers) and iPod connectivity. The Navigation package can be added to the Premium package and includes a hard-drive-based touchscreen navigation system (with streaming Bluetooth audio as well as real-time traffic and weather), voice-activated controls, a 9GB music server and a rearview camera. The entire 2010 Infiniti G37 line comes standard with stability control, traction control, front-seat side airbags, full-length side curtain airbags and active head restraints for the front seats.