An alternative solution would be to use some thin VHB tape (clean the surfaces first). Quick and easy to use. There are parts already in the Model S held on by VHB tape from the factory. It handles weather really well too (it's a foam, so it can handle expansion and contraction cycles well - there apparently is a sky-scraper in UAE with all glass panels on the outside held on by VHB). I have used VHB tape to mount a few items on the Tesla, even much heavier than plastic tim, it's held up for years through weather, car washes, etc.