- Rear trunk won't close on it's own; with nothing in the trunk and open, I'll press the button to close, and it will get 99% there then fail to latch and re-open and beep at me, angrily.
If this is anything like the rear hatch of the Model S, then a few types of things can cause this issue. Stoppers or latch can be misaligned, or the pinch strip sensors can be misfiring. Took the service center multiple trips to figure out why my hatch wasn't closing all the time (would fail as you described once every 3 or 4 tries -- and I use the hatch at least 2x a day it was super annoying). Since they fixed the pinch sensors it has been flawless.