Turn off the Autobahn A5 at exit Karlsruhe-Durlach (44) towards Karlsruhe and follow the Durlacher Allee. Continue on Durlacher Allee, then turn right into Bertholdstrasse. From Bertholdstrasse continue straight onto Adenauerring. Turn right off Adenauerring into Michiganstrasse. Then turn right again into Erzbergerstrasse. Take the third possibility left to make a u-turn, then you will reach Erzbergerstrasse 117 on your right. Just next to the building there is a parking garage, you can park on the 2. lower level (follow the Netviewer signs).
At Karlsruhe main station enter a tram of line 3 (direction: "Heide") which brings you directly to the station "Duale Hochschule" where you get off. The Netviewer offices are located opposite from the station.