During my last visit in Berlin, I used the U-Bahn and the S-Bahn.
In this video, you can see how I got back to Kaiserin-Augusta-Straße from Ostkreuz.
First, I took the S3 to Jannowitzbrücke, there I changed trains to the U8, to get in Tempelhof.
There I changed again to the U6, to get in Kaiserin-Augusta-Straße.
I hope you will enjoy the video!
If you have any questions, just write it down in the comments.