Should have taken the KVB/SWB line 16 from Cologne HBF to Bonn Bad Godesberg Rheinalle/BF instead, and the bus line 855 from there to Meckenheim BF, or so :)

( https://en.wikipedia.org/wiki/Stadtbahnwagen_B#/media/File:K... / https://de.wikipedia.org/wiki/Rheinuferbahn / https://de.wikipedia.org/wiki/Stadtbahnstrecke_Bonn%E2%80%93... )