2011 Toyota Prius Owners Manual - Page 248

2-4. Using other driving systems n Setting the vehicle speed (vehicle-to-vehicle distance control mode) STEP 1 Press the "ON-OFF" button to activate the cruise control. Press the button again to deactivate the cruise control. STEP 2 Accelerate or decelerate the vehicle to the desired speed, and push the lever down to set the speed. Cruise control "SET" indicator will come on. ITO24P122 222 PRIUS_U (OM47685U) DVD