So I bought special wall hooks for my guitars, marked the spot where to drill, checked it for any foreign objects using a metal detector aaaaaand…. ended up touching the one and only power line in this room.
The irony is that I not only checked this area with a metal detector, but that parts of my studies included lessons in civil engineering and the info that there’s something in German law called “Baurichtmaße” which defines the exact distance of electricity cables inside a wall. SO I should have known better and just ignored it. Stupid me! 😀