An excellent department store on Alexanderplatz next to the station, we have visited it more than once, there is a good and inexpensive selection of alcohol. A good assortment of authentic German clothes.
A good, more convenient shopping center on Alexander Square. There are many brands represented, the prices are average. Free Wi-Fi. On the top floor there is a cafe-dining room, large and small plates, take what you want.
A large selection of clothes and household goods. There is also a grocery store with a very good assortment of wine.
I didn't like that in order to return the taxi, you need to go to the top floor and stand in line instead of getting a check at the checkout