The 2009 Audi S4 is currently available only as a convertible (Cabriolet) in one well-equipped trim level. Standard features include 18-inch wheels, performance tires, a power-operated and sound-insulated soft top, xenon HID headlights, 12-way power-adjustable seats, leather upholstery, dual-zone automatic climate control, heated mirrors, heated front seats, Bluetooth and a 10-speaker audio system with a six-CD changer and satellite radio.Options include heated rear seats, a navigation system, a rear parking system, iPod connectivity and a Convenience package that adds 18-inch wheels, auto-dimming mirrors, driver-seat memory and a Bose premium sound system.