For passenger side vents get a flat head screw driver and slide it in the space between dash and ring then slowly push handle of screw driver in the direction towards the center of the vent to separate the ring from the dash and wiggle that side forward. This will get the clip off of the dash. There are a total of three clips on the back side of the ring they are all equally spaced around the circle. Repeat the process for the next clip and once you have two of them undone you can usually pull out the third without breaking the clip if you kind of wiggle the ring towards the side the clip is on
