But small is beautiful and it is astoundingly efficient, stress-free, and easy to negotiate. If you want to save money on trying to extract details from a country far away, you could try their website , but don't expect too much, it's only in german. Tickets cost DM4.20 and are valid for two hours for all public transport. There's a new express bus, the Jetexpress TXL which will take you direct to Potsdamer Platz and Unter den Linden, the eastern centre of town. A bus service takes you from the airport to the Station.
All services run through the night.
For more information on public transport in Berlin, click here .