If you come by train or plane, take the tram No 6 (direction "Universität) to "Universität Zentralbereich". The tram runs from the airport (opposite of the arrival exit) via the main train station (platefrom E in front of the main entrance of the station) directly to the University. It takes about 30 minutes from the airport and about 15 minutes from the train station. At "Universität Zentralbereich" you take the stairs up to the boulevard to building NW2 (last on your right side, see map).
If you come by car, you take exit Horn-Lehe (Universität) from Autobahn A27 (Bremen-Bremerhaven). You can find suitable parking on the paking lot at "Leobener Strasse". Coming from "Hochschulring" into "Leobener Strasse" you take the first entrance on the right to the parking lot. The parking fee is 0.70 € for one day. The machine takes only coins and does not return any change. From the parking lot your walk down "Leobener Strasse" to the end and take the stairs on your left up to the boulevard (building NW2 is the first on your left, see map).