2008 Lexus IS 250 Owners Manual - Page 155

2-4. Using other driving systems Dynamic radar cruise control (if equipped) Dynamic radar cruise control supplements conventional cruise control with a vehicle-to-vehicle distance control. In the vehicle-to-vehicle distance control mode, the vehicle automatically accelerates or decelerates in order to maintain a set following distance from vehicles ahead. n Select cruise mode Selecting vehicle-to-vehicle distance control mode Turn the "ON-OFF" button on. Push the button once more to deactivate. 2 When driving 155 Selecting conventional constant speed control mode Turn the "ON-OFF" button on. Push the button once more to deactivate. Vehicle-to-vehicle distance control mode is always reset when the "ENGINE START STOP" switch is switched to IGNITION ON mode. Switch to constant speed control mode. (push and hold for approximately one second)