In addition to the 19-inch alloy wheels and sport-tuned suspension, the 2006 Infiniti Q45 Sport also comes standard with a full-size matching spare located in the trunk. Among the features shared with the base Q45 are a navigation system with a seven-inch center screen; power, heated front seats with driver’s side memory; genuine maple interior trim; a 300-watt Bose sound system with a six-disc CD changer and AudioPilot Noise Compensation; a power sunroof; and an integrated Bluetooth phone system.