I watched the first two seasons on Netflix and wondered if there were more seasons. I found out that there should even be 5 seasons who knows where I could watch them in German (online)?
3, 4 and you can watch the first following the 5th at crunchyroll with ger sub. (the Japanese synchro is better anyway)
The third is still available with Ger Dub on Anime on Demand. But the synchronization is not yet there, you have to be patient
Nobody asked about that…
Lululu
S3 on anime on demand (dub)
S4 and 5 are available on crunyroll (ger sub)