The MAR building is easy to reach by public transportation. The bus line 245 starts from "Zoologischer Garten" passes by "Ernst-Reuter-Platz" and has a stop directly next to the MAR building.
Station "Ernst-Reuter-Platz": Line 2 (red Line)
Stop "Marchbrücke": Line 245
Stop "Ernst-Reuter-Platz": Lines M45, 245, and X9
Commuter railway system (S-Bahn):
Station "Tiergarten": Lines S5, S7, S75, S9
From the main train station (Hauptbahnhof, sometimes also called Lehrter Bahnhof) take a regional train (RE1, RE2, RE7, RB10, RB14) or S-Bahn (S5, S7, S75, S9) to station "Tiergarten" if you want to walk (see map above) or to "Zoologischer Garten" if you want to take a bus/U-Bahn. From Zoologischer Garten you can take M45 or X9 bus or take the U-Bahn (Line 2) to stop "Ernst-Reuter-Platz". Bus line 245 has a stop directly next to the MAR building. Alternatively, you can take a taxi cab from "Zoologischer Garten". If you wave down a cab in the street (not at a taxi stand) you can ask the driver for a "Kurzstrecke" and you will be able to ride for 2km for about 4 Euro fixed rate. That's enough to go to Marchstraße 23, our address.