Hello Axel!
Welcome among us, it's always nice to see folks from Europe. I'm also from Europe, I'm from Hungary. The first thing what I would advice you that don't care with the temperatures, usually if you dont live in a good microclimate or you have a heated house wall, your figs will freeze to the ground in every 3 years in my experiences. So if you wanna grow them you just have to protect them, or grow them in low cordon shape. You can see more information about this low cordon shape if you type "espalier" into the searcher.
Or you can grow them in pots, and take them to your garage in every winter...
The next thing is to find the most earliest varieties for main crop, because the summers are usually short in Germany, like here in our country, probably our summers are a bit longer than yours, so it's very important. The best varieties are Michurinska 10 (Florea in america), Ronde de Bordeaux, Saint anthony, Dalmatie and there are many others.
If you need more information bout figs just contact me, I will answer you as fast as I can.