Problems with C4 Grand Picasso Bj 2017 / 7

Hello people, here would like to describe my first experiences with my C4 (17000 km, first registration 7 / 2917) bought a month ago. The lane assistant doesn’t make a sound, the automatic driving light doesn’t work, one of the rear seats jumps up by itself, start / stop doesn’t seem to work (all consumers are turned off), of course all these aids are activated. Is that normal!? I am Opel (similar functions), and Ford (less) but what was there I am an Austrian, and I bought the car from a German dealer and now have the car in operation for a week. (The car came from a car rental company) Lg Willi