Since the mentors themselves are students at the institute, they are often the best first option for getting answers to questions about studying. The mentors will accompany you through your first year of study.
For further questions regarding your studies please contact the Students' Council, which consists of students from all semesters.
The professors and lecturers are the right people to contact with regarding questions about course guidelines and examination and study regulations or individual courses.
If you have general questions about your studies, be it matriculation or Bafög, the Student Advisory Service of the Freie Universität is there for you.