The 2009 Infiniti M45 is a midsize luxury sport sedan available in two well-equipped trim levels. The base model M45 and the all-wheel-drive M45x have standard features that include 18-inch alloy wheels, adaptive xenon headlights, a sunroof, keyless ignition and entry, leather upholstery, 10-way power front seats with heating and cooling, driver-seat memory settings, dual-zone automatic climate control, Bluetooth and a six-speaker audio system with a six-CD/MP3 changer and an auxiliary audio jack.Options are grouped into packages with slight variations between the M45 and M45x. The Sport package, which is not available on the G45x, includes 19-inch alloy wheels with high-performance tires, sport body styling, rear active steering, a stiffer sport-tuned suspension, aluminum trim that replaces the standard wood accents and sport seats with added side bolstering. The technology package adds a hard-drive-based navigation system, an upgraded eight-speaker Bose sound system with a 9GB music server, a rearview camera, iPod connectivity and voice-activated controls. An advanced technology package can be added that includes a premium 14-speaker surround sound system, a lane departure warning system and adaptive cruise control.
A mobile entertainment system is available in conjunction with all previous packages, but only for rear-wheel-drive M45s. This package basically consists of a rear entertainment system. Finally, a premium package is available that includes all of the previous packages (minus the sport package) and adds heated and reclining rear seats, rear air-conditioning and audio controls, and a power rear sunshade.