Heeresversuchsanstalt Peenemünde
Normally, the Berlin S-Bahn operated "Halbzüge" (“half trains”, four-carriage sets, for example, ET+EB+EB+ET) and, by the end of the war, DRG had rebuilt all former driving carriages (ES) into trailer carriages (EB). The materials from the former cabs were used to build other motor carriages (ET). After 1945, however, some units were restored as two-carriage sets of motor and driving carriages (ET + ES). In addition, in 1952, the S-Bahn took over two-carriage sets (ET + ES) from the railway workshop of the Peenemünde Army Research Center. These were called "Peenemünder Viertel" (Peenemünde quarter sets) in Berlin.