Not sure about the breakfast, but you are staying at the finest hotel in Berlin! You will enjoy all that you can walk to and really enjoy Berlin.
Have a wonderful stay, and hope you do get that breakfast.
BTW, one of my friends, John, (From Ireland), has been a chef there, and is a wonderful guy. If you can, say hello!
I'm not sure either switrips, but the CL in the Marriott across the street had a really wonderful breakfast spread... nice CL too!!