1999 Subaru Impreza Owner's Manual - Page 206

If you lose power steering assist because the engine stops or the system fails to function, you can steer but it will take much more effort. Cruise control (if equipped) WARNING Do not use the cruise control under any of the following conditions. This may cause loss of vehicle control: D driving up or down a steep grade D driving on slippery or winding roads D driving in heavy traffic 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 unintentional cruise settiing. J To set cruise control Cruise main switch Cruise control lever HG0311 HG0312 1. Push the "CRUISE" main switch. 2. Depress the accelerator pedal until the vehicle reaches to the desired speed. 3. Push the control lever downward in the "SET, COAST" direction and release it. Then release the accelerator pedal. 7-24