The Ringbahn and suburban trains coming from the east ran to Charlottenburg via the Stadtbahn tracks. Since 1911 there was a connection for suburban traffic with the Spandau Suburban Line to via Rennbahn and Pichelsberg. This was connected to the existing pair of long-distance tracks of the Stadtbahn at Heerstraße station to minimise costs. The number of trains that could run on the Spandau Suburban Line was therefore limited by the occupancy of the long-distance tracks of the Stadtbahn. Operation of all suburban traffic to Spandau via the Berlin–Lehrte railway, which runs further north, was ruled out because the Lehrter Bahnhof had already reached the limit of its capacity. As part of the main electrification of the suburban railways between 1924 and 1933, the Berlin Stadtbahn, Ringbahn and suburban line to Spandau was to have its own pair of tracks between Charlottenburg and Heerstraße. In addition, it was planned to remove the level junction between the Stadtbahn and the south ring curve and to construct a turnback east of Charlottenburg station. A station would be built to improve the interchange between the two lines at the intersection of the extended Stadtbahn and the Ringbahn. Previously passengers who arrived on trains running on the full Ringbahn had to change trains twice to reach Heerstrasse or Grunewald (in Halensee or Westend and in Charlottenburg). During the construction, the Reichsbahn had to take into account the interests of the city of Berlin, which wanted to build an exhibition grounds on an area of around 100 hectares south of Kaiserdamm. In order not to cut up the site, the Reichsbahn had to relocate the lines to Spandau on the southern edge of the site. The new pair of suburban tracks to Spandau went into operation on 23 August 1928. In addition to its primary use as a transfer station between the Stadtbahn and the Ringbahn, the new station was also intended as an entrance and exit to the planned exhibition centre and was therefore given the name of Ausstellung (exhibition). For this reason, the station was given a large entrance building that was connected via a side road with Halenseestraße. Two island platforms were built for the Stadtbahn with operations in the same direction on both sided of each platform. Turnbacks were built at both ends of the platforms; the western turnback was primarily intended for trains stopping at Messe station, the eastern turnback