Here is how I proceeded to remove the caps:
Basically it is lower part of the cap first and then the upper part.
- Start to lift and pull the lower green part of the cap (on the picture).
To do so, I used a thin tool to lift that side until the orange part popped out a bit (on the second picture)
- now use your fingers: grab the part you lifted with both hands one hand on each side (vertical and horizontal) of the caps
- Pull straight and a bit upward: the lower hooks need to be lift up when the hooks on the top of the cap need to go out straight
The entire cap should go out in one second. Otherwise try to gently (with your fingers still) lift more of he green part of the cap.
The first time, it took me 15 minutes to find the right way to do it, for the second cap I did it in 2 min (replacement included).
To install the replacement caps:
- Place the new cap aligned with the side mirror.
- The trick to do it is to align the top center hook into its hole (blue on the picture). It is easy to do since its hole is a wide cylinder that will guide the hook in place. You will feel the hook sliding against this cylinder.
- Then just push strongly every thing back in place. Starting from the top hooks to the bottom ones.
(Please apologize for crappy draw on pictures, I did it with an iPad)