Subway:
Line No. 66 (towards Siegburg) for a stop to 'Stadthaus'
Electric: Line n ° 61 towards 'Kopenhagener Strasse' or Line 62 for 'Oberkassel / Römlinghoven'. Walk two stops to 'StadthausOxfordstrasseMaxstrasseThomas-Mann-StrasseBerliner PlatzMaxstrasseHauptbahnhof' (Mainstation). Then follow the instructions above.