Hi Alfonso
the shop near Kudamm is Wüstefeld. It is located in the Grollmannstr. 36. Here is the link:
If you have some time you can visit Wansee (Villa Liebermann http://max-liebermann.de/PWP/(S(nugb...t.aspx?TabID=1) and Potsdam. There are lots of old houses and the dutch Village (Holländerviertel)
All the best from Berlin and have a good trip
stefan d