Thanks for posting. A couple of questions if I may. In the US we are accustomed to seeing a box set into the wall, Then the switches and outlets mounted in that box, then a cover plate. Is there a box in the pix shown or are they mounted to the wall?

Also, the switch and outlet are what we call back stab. (no screws to wrap the wires around.) is that how all outlets and switches are done in Germany?

In another pix showing a wet location junction box it looks like wires are joined by pushing them into some sort of product that takes the place of our "Wire Nut" What is that called?

Thanks.