Additionally , in the network of Frankfurt S - Bahn , all units of the class 420 have been retired in November 2014 .
Additionally , in the network of Frankfurt S - Bahn , all units of the class 420 have been replaced by the new class 430 .
Additionally , in the network of Frankfurt S - Bahn , all units of the class 420 have been retired in November 2014 and replaced by the new class 430 .