Class C1 trains are six carriages attached together in one continuous length with gangways between the carriages, allowing the passengers to walk from one end to other. https://en.wikipedia.org/wiki/Munich_U-Bahn#Class_C
https://en.wikipedia.org/wiki/MVG_Class_C#Design
It was already built from 1938-1941 as part of a planned S-Bahn network. For this reason Goetheplatz has a platform longer than the standard 120 metres (393 ft 8 in). https://en.wikipedia.org/wiki/Munich_U-Bahn#U6
long train stations
