Sthe keyboards are not QWERTY. They're QWERTZ.
Traffic lights are in excessive combinations of green/yellow/red. Sometimes you might have yellow/red light sometimes only red.
Roads often have "end of speed limit" sign. But the speed limit might have been temporary for construction. So now you have to remember the original speed limit. Why not post the actual speed limit again?
Stuff like this is absolutely everywhere in the German society for apparently no reason.
EDIT: Adding the best for last.. in Germany when you have an IBAN bank account (you know the I stands for international) you must have German international bank account, or else it will be rejected by everyone and everything.