There aren't any HSBC banks on Germany. The Bank on Kudamm is actually
HSBC Trinkhaus & Burkhardt a subsidiary of the HSBC Global Conglomerate. If you have a UK HSBC Debit or Credit card you can use it in any German ATM that displays the Maestro sign. If your card is from any other HSBC subsidiary check it for the Maestro Logo to be sure:

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Failing that compare any logos on your cards with the abundance of compatibility logos on the many machines