Germans evaluate service by what it actually delivers, not by how it is presented. The question is whether the service provider knows their domain, whether they execute their responsibilities properly, and whether the result meets the standard. A mechanic who is reserved but fixes the car correctly has provided excellent service. A consultant whose manner is plain but whose analysis is thorough has delivered genuine value.
Good intentions and a warm attitude are welcome, but they do not compensate for poor execution. When working with German colleagues or serving German clients, focus on the substance of what you deliver.
Demonstrate that you know your field. Produce work that meets the standard. The quality of your output is the primary measure of your service quality, and Germans will evaluate you on that basis.
Comments