[p-schultz]

It's only allowed at some intersections. There's a sign that allows you to do it, an unlit green arrow [1]. This sign is pretty much exclusive to eastern Germany (it stems from the former GDR); you'll almost never see it in the western parts.

[1]: https://www.thelocal.de/userdata/images/article/2a9465965ec3...

[mogoman]

They have them in a few intersections here in Munich too