Before you begin to drive, move the shoulder belt height adjuster to the height that is right for you.
Adjust the height so that the shoulder portion of the belt is centered on your shoulder. The belt should be away from your face and neck, but not falling off your shoulder. Incorrect positioning of the shoulder belt can reduce the effectiveness of the safety belt.
To move it up or down, press the square button (A) in the center of the height adjuster knob and move the height adjuster to the desired position.
After you move the height adjuster to where you want it, try to move it up and down without touching the square button to make sure it has locked into position.