On this website you can find important information concerning your application, deadlines, required language skills, visas, admission etc.:

http://www.fu-berlin.de/en/informationen-fuer/studienbewerber 

Should you have any further questions, please contact the Info-Service of the Academic Advisory Service:

Address:	Iltisstr. 4 & Iltisstr. 1, 14195 Berlin
Telephone:	(030) 838 700 00
E-Mail:	Info-Service@fu-berlin.de
Homepage:	http://www.fu-berlin.de/en/studium/beratung/ssc/index.html