By lux airport Sixt, I received an excellent service, she helped me changing the car from fully elec to fuel car, and arranged the way that I don't have to fill in the tank when I return the car, so all arrangements by her made me safely and most conveniently back to Amsterdam.
I was not familiar with this BMW X1 automatic car, luckily a very friendly young staf passed by when I was in the garage, he helped by explaining and showing me how to start and drive this car. I am very grateful.