I was trying to find a way to replace switch buttons on Panamera, since one of my master button switches (front driver window button) is missing the chrome trim at the edge if it.
I set out to learn how to replace. Came across the video that shows you how to replace button face itself. Even though the master switch is removed from the door, one can easily see how this can be done with the switch inside the doors. Simply unhitch one side of the button and remove the button itself, insert replacement that has chrome on it.
These buttons can be bought off ebay 20 bucks per 4 (one for each window). I thought this would be useful for some on here. Good luck.
To support above video, here are all steps in pics. Now, you have no excuse not to do.
Follow pics in sequence. Good luck.