Hi,
In Prius, what is ACC position and where do I see it

On my 2008 USA model I push the Climate button on the left side of the center monitor. It brings up the heat / ac screen and push the auto on the touch screen and set the desired temp. Here in the east coast it is cool in the morning 45 to 55 degrees then warms to the 70's in the afternoon and the car selects either heat or cool as needed. Also on the steering wheel on the left side you can raise or lower the desired temp you want. Hope it helps..

There are 2 levels of ACC. Do NOT press the brake pedal, press the Power button and you have Level 1. You are able to play the sound system and a few other functions. Press the Power button a second time (again w/o pressing the brake pedal) and you have almost every electric function of the car, including raising & lowering the windows:)