DRG Class ET 125

DR Class 125
ET 166 047 (adapted from ET 125) in Erkner
Manufacturer	O&K, Dessauer Waggonfabrik, Wegmann – Wagenkästen; AEG, SSW – elektrischer Teil
Constructed	1934-1935
Scrapped	2003
Number built	18 power cars, 18 trailer cars
Specifications
Train length	36.2 m (118 ft 9 in)
Maximum speed	90 km/h (56 mph)
Weight	59 t (58 long tons; 65 short tons)
Electric system(s)	750 V DC third rail
Current collection	Contact shoe
UIC classification	Bo'Bo'+2'2'
Safety system(s)	mechanical train stop
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge

The 1941 Class ET 125, later adjusted series 276.0 (DR) or 477 (DBAG), was an electric railcar which traversed the DC-powered S-Bahn in Berlin during 1934/35. It was built in 1936 and 1938. The cars, which were popularly known as banker trains, were rebuilt after World War II and the series ET / EB 166 adapted. Among other things, they lost the more powerful 1949/50 traction motors. From the 1970s, they were included in the modernization program and in series 277 rebuilt (after 1991 477/877), they were used on Berlin's S-Bahn network until 2003.

These trains were deployed when the section between Potsdamer Ringbahnhof and Wannsee were electrified including the part of Zehlendorf stretch.