2005 Subaru Impreza Owner's Manual - Page 301

Starting and operating they may burn easily if they come near hot engine or exhaust system parts. Be sure to stop the engine if you take a nap in the vehicle. If engine exhaust gas enters the passenger compartment, occupants in the vehicle could die from carbon monoxide (CO) contained in the exhaust gas. Cruise control Cruise control enables you to maintain a constant vehicle speed without holding your foot on the accelerator pedal and it is operative when the vehicle speed is 25 mph (40 km/h) or more. Make sure the main switch is turned "OFF" when the cruise control is not in use to avoid unintentionally setting the cruise control. NOTE If your vehicle has a front underspoiler and rear underspoiler (both optional), pay attention to blocks and other obstructions on the ground when parking. The underspoilers could be damaged by contact with them. If you move the cruise control lever while turning the ignition switch "ON", the cruise control function is deactivated and the "CRUISE" indicator light flashes. To reactivate the cruise control function, turn the ignition switch back to the "ACC" or "LOCK" position, and then turn it again to the "ON" position. Do not use the cruise control under any of the following conditions. This may cause loss of vehicle control: driving up or down a steep grade driving on slippery or winding roads driving in heavy traffic 7-38