From Tegel Airport:
Take the X9 bus and get out after 3 stops, at Quedlinburgerstrasse.
From Scönefeld Airport:
Take the S45 S-Bahn (city rail) line to Jungfernheide and change to the X9 bus or U7 underground line.
The Mierendorffplatz underground station (on the U7 line) can be reached on foot from the hotel within 3 minutes (200 metres).