If you dont live in the dorm:
We are not responsible for renting the rooms of the dorm. All the inquiries should be made to Studentenwerk contact partner (Ansprechpartner\in). You can reach them through this link
If you live in the dorm:
You can reach all the presidium members by just knocking on their door, or using their contact information posted on the entrance board. They can help you with all the questions you might have!