Ubahn Kurfuersten entrance-elevator closest and stairs in
background. I looked up what lines are available here they are U1 and U3.The sign on the building on left- C&A- is a clothing store chain all around the city. Dorit, Eva sister, worked at the one in Spandau.
Another tidbit, the paving stones in the foreground were supplied by a company where Eva worked. They are used on sidewalks all over Berlin.