Instead an existing service between Rangsdorf and Wünsdorf was extended to Mahlow,[5] but it was diverted to run over the Outer Ring to Schönefeld in May 1963.

[5] In order to maintain a connection to Mahlow, a separate platform was built at Blankenfelde station and the short section was served by a shuttle service.

This was operated during the first years by a train that included a diesel locomotive of class V 15 and a control car.

[5][6] After the reunification of Germany, it was decided to reconnect the West Berlin S-Bahn network with the surrounding area.

Since the Dresden Railway had been electrified with the overhead system in 1985, the restoration of the S-Bahn to Rangsdorf would have required a completely new section of track to be built.