After the First World War the volume transported on the line from Freilassing to Berchtesgaden rose sharply.
A. Maffei in Munich, whilst the electrical components came from Pöge Elektrizitäts AG in Chemnitz.
EG 4 22 101 and 22 102, but due to problems with the delivery of the electrical components the locomotives were not ready until 1927.
As a result, they were given the numbers E 79 01 and 02 by the Deutsche Reichsbahn based on their renumbering plan.
Another problem was the procurement of spares for the small number of units in this class.