Bus line 113(maybe from Altona S-Bahn-station): station "Schulweg": You get off the bus at the major intersection Osterstraße/Schulweg. Enter the Osterstraße in direction east towards Bundesstraße. The first street on the left is Eppendorfer Weg. The B, T & W is on the right side close to the crosssection with Eichenstr.
Or bus line 182: station "Kaiser-Friedrich-Ufer". After you go a bit westward and cross the bridge above the Isebekkanal ("Eimsbüttler Brücke"), turn right into Eppendorfer Weg. The B, T & W is on the right side close to the crosssection with Eichenstr.
You can take the Buses 182 from the subway station "Schlump" (Subway lines U2 (red) and U3 (yellow)). After you emerge from the underground, leave the station left hand (there's a Kebab shop on the right side) and you see directly the bus stop for 182.