Your vehicle is equipped with rear climate controls. These controls allow for independent control of fan speed and temperature for rear seat passengers. This is the fan speed control dial. When set to zero, the rear controls are turned OFF. Turn the dial right or left to increase or decrease fan speed. This is the temperature control dial. Turn the dial left for cooler, or right for warmer air. Please note - when the temperature control dial is turned all the way to the left, air will flow only from the ceiling vents. When the dial is turned all the way to the right, air will flow only from the floor vents.