DR Class 270

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DR Class 270 DBAG Class 485/885
DBAG Class 485 at Berlin Prenzlauer Allee station
In service	1990–2023
Manufacturer	AEG
Constructed	1987 (pilot series), 1990–1992
Number built	166 power cars, 166 trailer cars
Number in service	0
Operators	Deutsche Bahn AG Berlin S-Bahn
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 DC third rail
Current collector(s)	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 DR Class 270 was an electric multiple unit of the Berlin S-Bahn. It was designed for the Deutsche Reichsbahn (East Germany) and was intended to be the replacement for the ageing fleet of S-Bahn units in East Berlin. Test runs were started in 1987 and the first batch was delivered in 1990. After German reunification, Class 270 units were reclassified as DBAG Class 485. A second batch was cancelled in favour of a new design, the DBAG Class 481.