If there is an acute risk of suicide: Dial 112 (ambulance service) or the 110 (Police).
In the event of a mental crisis, contact the Berlin crisis service for Pankow: (030) 390 63 40 at night from midnight to 8 a.m. and on weekends and public holidays from 8 a.m. to 4 p.m.: (030) 390 63 10.
https://www.berliner-krisendienst.de/ich-brauche-hilfe/pankow/
You can also reach the Telephone counseling Berlin on the toll-free number 0 800 111 0 111. The telephone counseling is open to all problems and to all callers in their respective situation, regardless of religious or political views, origin or gender – toll-free, anonymous and 24/7.
https://www.telefonseelsorge-berlin.de/