The BDL office is located directly at Potsdamer Platz and is therefore ideally accessible by public transport:
From BER airport, take regional train RB 14 or S-Bahn to Friedrichstraße, change to S-Bahn and get off at Potsdamer Platz. From there it is a few minutes walk.
By Train / Public Transport
From the main train station, take bus M 41 or M 85 to the Potsdamer Platz/Voßstraße stop. From there it is a few minutes walk. Alternatively, take the regional train R 4 or R 5 directly to the stop Potsdamer Platz or the subway U 5 to the stop Brandenburger Tor, change trains there and take the suburban train S 2 one stop to the stop Potsdamer Platz. From there it is a few minutes walk.
Up-to-date timetable information and route planners as well as possible traffic obstructions can be found on the websites of the Berliner Verkehrsbetriebe (www.bvg.de) and the S-Bahn Berlin (www.s-bahn-berlin.de).
There are several public underground car parks at Potsdamer Platz, e.g. at Potsdamer Platz Arkaden/The Playce.