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A postal worker loads parcels into a StreetScooter emission-free electric light commercial vehicle (LCV) ahead of distribution at a Deutsche Post AG delivery station in Hamburg, Germany, on Tuesday, March 7, 2017. With car makers including Volkswagen AG and Daimler AG unable, or unwilling, to develop a van for Deutsche Post AG that was meant to offer little beyond the ability to carry a maximum of parcels at zero emissions, Europe's largest postal service partnered with a university professor to develop the vehicle itself. Photographer: Krisztian Bocsi/Bloomberg via Getty Images

A postal worker loads parcels into a StreetScooter emission-free electric light commercial vehicle (LCV) ahead of distribution at a Deutsche Post AG delivery station in Hamburg, Germany, on Tuesday, March 7, 2017. With car makers including Volkswagen AG and Daimler AG unable, or unwilling, to develop a van for Deutsche Post AG that was meant to offer little beyond the ability to carry a maximum of parcels at zero emissions, Europe's largest postal service partnered with a university professor to develop the vehicle itself. Photographer: Krisztian Bocsi/Bloomberg via Getty Images

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A Deutsche Post AG postal worker prepares to load a StreetScooter emission-free electric light commercial vehicle (LCV) at a delivery station in Hamburg, Germany, on Tuesday, March 7, 2017. With car makers including Volkswagen AG and Daimler AG unable, or unwilling, to develop a van for Deutsche Post AG that was meant to offer little beyond the ability to carry a maximum of parcels at zero emissions, Europe's largest postal service partnered with a university professor to develop the vehicle itself. Photographer: Krisztian Bocsi/Bloomberg via Getty Images

A Deutsche Post AG postal worker prepares to load a StreetScooter emission-free electric light commercial vehicle (LCV) at a delivery station in Hamburg, Germany, on Tuesday, March 7, 2017. With car makers including Volkswagen AG and Daimler AG unable, or unwilling, to develop a van for Deutsche Post AG that was meant to offer little beyond the ability to carry a maximum of parcels at zero emissions, Europe's largest postal service partnered with a university professor to develop the vehicle itself. Photographer: Krisztian Bocsi/Bloomberg via Getty Images

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An electric charging cable sits connected to StreetScooter emission-free electric light commercial vehicle (LCV), developed by Deutsche Post AG, outside a delivery station in Hamburg, Germany, on Tuesday, March 7, 2017. With car makers including Volkswagen AG and Daimler AG unable, or unwilling, to develop a van for Deutsche Post AG that was meant to offer little beyond the ability to carry a maximum of parcels at zero emissions, Europe's largest postal service partnered with a university professor to develop the vehicle itself. Photographer: Krisztian Bocsi/Bloomberg via Getty Images

An electric charging cable sits connected to StreetScooter emission-free electric light commercial vehicle (LCV), developed by Deutsche Post AG, outside a delivery station in Hamburg, Germany, on Tuesday, March 7, 2017. With car makers including Volkswagen AG and Daimler AG unable, or unwilling, to develop a van for Deutsche Post AG that was meant to offer little beyond the ability to carry a maximum of parcels at zero emissions, Europe's largest postal service partnered with a university professor to develop the vehicle itself. Photographer: Krisztian Bocsi/Bloomberg via Getty Images

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A Deutsche Post AG employee uses a StreetScooter emission-free electric light commercial vehicle (LCV) to make a postal delivery in Hamburg, Germany, on Tuesday, March 7, 2017. With car makers including Volkswagen AG and Daimler AG unable, or unwilling, to develop a van for Deutsche Post AG that was meant to offer little beyond the ability to carry a maximum of parcels at zero emissions, Europe's largest postal service partnered with a university professor to develop the vehicle itself. Photographer: Krisztian Bocsi/Bloomberg via Getty Images

A Deutsche Post AG employee uses a StreetScooter emission-free electric light commercial vehicle (LCV) to make a postal delivery in Hamburg, Germany, on Tuesday, March 7, 2017. With car makers including Volkswagen AG and Daimler AG unable, or unwilling, to develop a van for Deutsche Post AG that was meant to offer little beyond the ability to carry a maximum of parcels at zero emissions, Europe's largest postal service partnered with a university professor to develop the vehicle itself. Photographer: Krisztian Bocsi/Bloomberg via Getty Images

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A Deutsche Post AG logo sits on the steering wheel of a StreetScooter emission-free electric light commercial vehicle (LCV) in Hamburg, Germany, on Tuesday, March 7, 2017. With car makers including Volkswagen AG and Daimler AG unable, or unwilling, to develop a van for Deutsche Post AG that was meant to offer little beyond the ability to carry a maximum of parcels at zero emissions, Europe's largest postal service partnered with a university professor to develop the vehicle itself. Photographer: Krisztian Bocsi/Bloomberg via Getty Images

A Deutsche Post AG logo sits on the steering wheel of a StreetScooter emission-free electric light commercial vehicle (LCV) in Hamburg, Germany, on Tuesday, March 7, 2017. With car makers including Volkswagen AG and Daimler AG unable, or unwilling, to develop a van for Deutsche Post AG that was meant to offer little beyond the ability to carry a maximum of parcels at zero emissions, Europe's largest postal service partnered with a university professor to develop the vehicle itself. Photographer: Krisztian Bocsi/Bloomberg via Getty Images