 The branch line Bad Aibling-Feilnbach was built by the "Actiengesellschaft Elektricitätswerke" of Dresden, that had founded the South Germany Electrical Branch Line Company ("Süddeutsche Elektrische Lokalbahnen Aktiengesellschaft") or SEL in 1899 as the operating company.After the bankruptcy of the SEL in 1901 the Bavarian state railways took over the operations from time to time.A takeover of the vehicles, power station and operations by the LAG on 1 January 1904 followed.