page_title: BVG Class D
section_title: Class D
hierarchical_section_title: BVG Class D / Class D
caption_attribution_description: Deutsch: ex-D55 als DE im Bahnhof Hönow, Anfang März 2017 auf TestfahrtenEnglish: Modernized D55 train at Hönow U-Bahn station, Berlin
context_page_description: Class D was a type of electric multiple unit train used by the Berlin U-Bahn.
  After World War II the trains of the Berlin U-Bahn were worn out, making a new series of trains necessary. From 1957 on the new D type trains were delivered. They were made of steel, making them very heavy. In 1965, the DL type was developed, which was constructed from lighter metals. This way, weight was reduced by 26%. Like in earlier types the seats were located along the sides of the train.
context_section_description: The D type cars have been introduced in various phases:
  D 55: The test vehicle (2000/2001), which is on the Line C II (Mehringdamm - Tempelhof)
  D 57: 26 trains (2002/2003 - 2052/2053), which is on the Line C I, during the opening of the line to Tegel (now known as U6).
  D 60: 30 trains (2054/2055 - 2112/2113), which is on the Line G (now known as U9, the line was built as an alternative line when the Berlin Wall is built).
  D 63: 36 trains (2114/2115 - 2184/2185), which is on the Line C I, during the opening of the line to Britz (now known as U7).
  D 65: 22 trains (2186/2187 - 2228/2229), which is on the Line C II, during the extension to Alt-Mariendorf.
  On 1974 with the introduction of F type cars, the D 60 trains were redeployed to Line 6 and D 57 trains were redeployed to Line 8.
  Because the BVB (the East Berlin public transport authority) needed more trains for their new route to Hönow, BVB bought 98 cars of this type from the BVG in several phases, which is older and the shelf lifespan is 30 years and needs replacement. BVB renumbered all trains that were sent to East Berlin into the numbering system with the class number "110":
  1988: 2002/2003 to 2018/2019, 2022/2023 to 2052/2053 (when the U5 is extended to Elsterwader Platz), they were renumbered to 110 300 to 110 349.
  1989: 2054/2055 to 2112/2113, with the exception of 2072/2073, 2076/2077 and 2100/2101 (when the U5 is extended to Hönow), they were renumbered to 110 350 to 110 401.
  The first trains began revenue service on 110 326/327 (ex 2030/2031) and 110 306/307 (ex 2008/2009) on March 1988 via Alexanderplatz connecting tunnels. They were called DI in the east. Of course, they were painted in the East Berlin color scheme of ebony and yellow.
  7 trains (110 386-110 397, also known as 2096 to 2099 and 2102 to 2109) all returned to BVG early on November 1990. After the merger of BVB with BVG in January 1992, these trains continued to deploy on the U5, U6, U7 and U8 until the retirement in 1998-99. The last trains of the 'D' type were retired in 1999, and they were sold to Pyongyang Metro, North Korea.
caption: Modernised Class D on a trial run on the line U5, March 2017
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