At the motorway junction Oranienburg take the A111 to Berlin Zentrum, and at the motorway junction Charlottenburg turn onto the A 100. Leave at the Kaiserdamm exit, and turn left at the end of the slip road to turn onto the Kaiserdamm boulevard (later Bismarckstrasse). Continue over the traffic island into Strasse des 17 Juni, and the Main Building of the TU Berlin is on your right after 100 yards.
Take the motorway A10 (Berlin Ring) to the Drewitz motorway junction, then the AVUS (A 115) to Berlin-Zentrum. At the Funkturm follow the signs to Wedding, but then take the first exit to Kaiserdamm. Turn left at the end of the slip road to turn onto the Kaiserdamm boulevard (later Bismarckstrasse). Continue over the traffic island into Strasse des 17 Juni, and the Main Building of the TU Berlin is on your right after 100 yards.
The main campus is only a five minute walk from Zoologischer Garten railway station. If you arrive at a different station you can take the S-Bahn as described above.
Electronic timetable of the German railways (Deutsche Bahn AG)
The airport is very close to the Main Campus. Take the airport shuttle bus (X9) to Ernst-Reuter Platz (15 minutes) or take a taxi (10 minutes).
This is across the city, so a taxi is expensive unless you can share the costs. You have two alternatives at a lower price:
This city airport is fairly convenient. Take a 119 bus to Witternberg Platz, then take the underground U-Bahn Line 2 (destination Ruhleben or Olympiastadion) and travel through to Ernst Reuter Platz. Takes about 30 minutes.