The Welcome Center is providing a Welcome Guide for International Researchers. More information – also about the services of the Welcome Center – you can find here. Maybe, you are interested to join their International Stammtisch for Researchers sometime. The next meeting will be held on 21 June 2013, 7 pm. For registration and more information, please write an email to email@example.com.
In addition, the MPI-bpc PhD / Postdoc community provides a lot of further information and links here.