Thanks a lot for a nice stay in Berlin! It was an interesting experience for me, I haven't lived in a caravan before, even have never been inside one. Description of the place is completely accurate. All the equipment worked, I was particularly grateful for the heating fan. Bathroom in the apartment building was great. It was quite a challenge for me getting up in the morning and then climbing 3 floors up to the bathroom, but it was worth it.
Railway on the other side of the wall next to the caravan looked scary at the first sight, but it wasn't disturbing at all, to my great surprise, I slept very well.