2010 Subaru Impreza Owner's Manual - Page 270

Starting and operating 7-45 Hill start assist system (MT models - if equipped) CAUTION The Hill start assist system is a device only for helping the driver to START the vehicle on an uphill grade. To prevent accidents when the vehicle is parked on a slope, be sure to firmly set the parking brake. When setting the parking brake, make sure that the vehicle remains stationary when the clutch pedal is released. The Hill start assist system is a device to make starting on an uphill grade easier. On an uphill grade, when the clutch pedal is depressed while the brake pedal is also depressed, braking power is maintained temporarily by the Hill start assist system when the brake pedal is released. The driver is therefore able to start the vehicle the same way as on a level grade, just using the clutch and accelerator pedal. A slight jolt may be felt when the vehicle begins to move forward after being reversed. If the braking power of the Hill start assist system is insufficient after the brake pedal is released, apply more braking power by depressing the brake pedal again. & To activate/deactivate the Hill start assist system (WRX STI) CAUTION While the Hill start assist system is deactivated, when starting on an uphill grade, braking power is not maintained if the brake pedal is released. Start on an uphill grade by using the parking brake. The Hill start assist system does not operate when the vehicle is facing downhill. And the Hill start assist system may not operate on slight grades. When starting in reverse and using the Hill start assist system, a braking effect may be felt even after the brake pedal has been released. However, this braking effect should disappear once the clutch pedal is released. You can activate/deactivate the Hill start assist system according to the following procedure. ! To deactivate 1. Stop your vehicle in a flat and safe place and apply the parking brake. 2. Turn off the engine. 3. Restart the engine. - CONTINUED -