S-Bahn network. In 1972, however, only 101 of the ordered 120 trains were available, so that on some routes until 1975 had to be driven with turning trains. The first 120 vehicles came from the first series of this series. In the following years, due to the higher demand for vehicles, about 30 vehicles of the second construction series came to Munich. The number of trains of the second series of construction varied, as they were also exchanged with vehicles from other cities. From 1979 to 1982 also came vehicles of the fifth and sixth series to Munich, these were used after 1982 but again in other suburban rail networks. From 1992, some vehicles of the seventh and from 1996 the eighth series were added, so that the vehicle stock in Munich in 1996 included 209 vehicles. Since the delivery of Class 423 vehicles, the Class 420 trains have been delivered to other cities, sold or scrapped. For the time being, the last regular passenger service in the Munich S-Bahn network drove a train of this series, the so-called "Olympia motor coach", on 5 December 2004 on an amplifier circulation line S 8 and was since then only in the museum service at regular special trips to be found. Due to the electrification of the A line and the resulting vehicle shortage since December 2014 again series 420 trainsets are used. These are 15 units taken over from the S-Bahn Stuttgart, but due to the lack of regular train traffic, they can not run on the main line during rush hours. They therefore take over exclusively the amplifier services on the S 2 between Dachau and Altomünster as well as amplifier rides on the west branch of the S 4 line and the S 20 line. Currently planning the S-Bahn Munich and the Bavarian railway company, 20 to 30 other units from Stuttgart to Munich to match the rising numbers of passengers. These are to be equipped with the existing units with the Linienzugbeeinflussung in order to be able to drive in the trunk tunnel. 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