There are assumptions (and maybe biases) about how certain cultures are, and that can be considered in how to prepare for the meeting. However, it has been my experience that working on assumptions can prove very wrong. I think I will focus on creating rapport, mirroring the German partner, and ask a few key questions in the beginning to understand the perspective and the personality of the German partner. This will help me to appear more spontaneous and genuine, and to get my message across in a more influential way.