Those used to being provided with excellent service at home may need to rethink some expectations when abroad. The emotional relationships to clients differ in every country and can certainly be different in Germany.
The language barrier is a fact where translation of different thought processes complicate matters. Friction can arise through differing expectations and because of misunderstandings during conversation. Also, the knowledge, or lack thereof, of regional specifics of technical processes can further confuse matters.
Many companies and individual professionals excel at what they do. Some are specialised in helping expats in Neuss through expert advise, services and abilities.