This horrible cover falling off is plaguing some of our Routans. The only tool i used was a flat tip screwdriver. The pictures, description & details are of me replacing the passenger side.
First you will have to remove the mirror glass. Push the mirror in to expose the outside corner so you can unclip the mirror glass from the motor behind it using the screwdriver. There are a few of them so just get at least the 3 easiest you can reach. Be careful not to use too much force as you will break the clip off.
Here's another picture so you see what type of clips you are dealing with
After that you will see the back of the blinker light and push in the clip you see at the tip of the screwdriver.
Here's another picture of the clip that needs to be pushed
Once you push the clip in you can push the blinker light out from the backside
Pull it out until you see the connector and simply unplug it
Here are the new blinker lights and Part#'s: 7B0949101A for the left light & 7B0949102A for the right side.
Finally slide and snap everything back in the reverse order and voila
After all of that and getting to the drivers side which was slightly a little tighter to get into and maneuver towards the clips.....i realized that you can skip all of my steps and go straight to the blinker light clip
Modified by Autobahn_Bred at 7:45 PM 4-26-2010