Oh lordy, okay, just did this on my new 2018 Model S and what fun. The pliers struggled so I ended up using them closed to twist from one of the pentalobe edges, and that worked. My outer painted holder was screwed into the black mount that is double sided taped onto the car, so I had to remove the three normal screws for that.
But damn if the tape didn't have a TON of stick on that mount. I ended up having to use an all silicone spatula to get under the black mount and the bumper I was able to use that to get purchase and to break the tape bonds, going slowly, making sure it was perfectly clean. No hard plastic parts, all silicone, so soft enough not to leave a mark.
Then used rolling and sticking/grabbing technique to pull what was left. Took about a half hour but it's done and beautiful!