Since the route of the line A from Dachau to Altomünster was not electrified until April 2014, DB Class 428 was primarily used. These were located in the railway depot of the Südostbayernbahn in Mühldorf am Inn. The vehicles were procured again in 1998 for the track, previously were used on the line A n-car push-pull trains with diesel locomotives. However, the entrances to the trains were not barrier-free because of steps. Following the electrification of the line, it was replaced by a branch line of S2, and Class 420s were replaced as well in June 2017.