S-Bahn services commenced on 28 May 1972 as S-Bahn line 22 between Holzkirchen wing station (Holzkirchner Flügelbahnhof) of Munich Hauptbahnhof and Deisenhofen as they could not yet continue to the Starnberg wing station of the Hauptbahnhof because the southern lines tunnel, which passes under the long-distance tracks towards Pasing and the S-Bahn trunk line, was not yet available. With the opening of the southern lines tunnel on the S-Bahn route on 31 May 1981, the S-Bahn line from Deisenhofen continued to the Starnberg wing station.