Stockholm metro has this as well but I wouldn't call it "autonomous", it's just a departure button to get the train moving faster. The driver still has to grip the vigilance device after a certain amount of time.
In Vienna it's fully automated between stations. The main reason it's not fully automated is because there are no automatically closing doors in the stations. U5 is going to get it though: https://www.youtube.com/watch?v=VBDqq7rwLE0
You can quite often see the trains operate fully automatic though when the drivers are changing shifts at the end of the line. The driver typically leaves and locks the train, lets it reverse itself and then the next driver continues: https://www.youtube.com/watch?v=0eyjqS9lvNA
According to https://en.wikipedia.org/wiki/Vienna_U-Bahn#Fifth_expansion_... it seems that vienna isn't driverless yet.