From Berlin Brandenburg Airport (BER) to the apartment: 

(64 minutes) FEX → S+U Gesundbrunnen, change to S42 → S Beusselstraße, walk 15 minutes to the apartment

(67 minutes) FEX → S+U Gesundbrunnen, change to S42 → S+U Jungfernheide, change to M27 → Neues Ufer, walk 3 minutes to the apartment

(70 minutes) X7 → U Rudow, change to U7 → U Mierendorffplatz , change to M27 → Neues Ufer, walk 3 minutes to the apartment

(73 minutes) S9 → S Treptower Park, change to S42 → S Beusselstraße, walk 15 minutes to the apartment

From Berlin Central Station to the apartment:

(21 minutes) RB14 → S+U Jungfernheide, change to M27 → Neues Ufer, walk 3 minutes to the apartment

(22 minutes) M10  → U Turmstraße, change to M27 → Neues Ufer, walk 3 minutes to the apartment

(30 minutes) S5  → S+U Zoologischer Garten, change to U2 → U Bismarckstraße, change to U7 → U Mierendorffplatz , change to M27 → Neues Ufer, walk 3 minutes to the apartment

From Berlin Central Bus Station (ZOB) to the apartment:

(34 minutes) walk 12 minutes to S Messe Nord/ZOB, S41 → S Beusselstraße, walk 15 minutes to the apartment

(34 minutes) walk 12 minutes to S Messe Nord/ZOB, S41 → S+U Jungfernheide, change to M27 → Neues Ufer, walk 3 minutes to the apartment