The Vienna criminal head office aka lap dancing club is on Tiefer Graben next to the Hotel Das Tigra, formerly an extension to Hotel Orient.
The crooks make travelling between Berlin in Germany & Austria seem commonplace, because it is. With a Vignette (special road licence) the journey can be completed with ease in around 6 hours for $100. It does not differ hugely in cost or time opting to travel by standard bus, train or plane.
Due to the heavy Austrian accents of some characters, Netflix created a separate Standard High German language version. In that version, the characters still have a slight accent but can be more easily understood.