My tesla model 3 on "autopilot" (just keep speed) will ghost break if it sees some cars merging into an adjacent lane. Really dangerous, nobody expects a car decelerating from 130kph down to 50 on the nearly empty Autobahn. My previous car (VW) got that right. Overall it is a nice car (with a massive and increasing brand toxicity problem), but how can one trust the "full self driving" if it can't/doesn't even keep speed in supposedly trivial cases where the driver has control?