The first power car of the serial production was officially delivered to Bundesbahn on 26 September 1989 at Krauss-Maffei's factory in Munich. Numerous guests of honor were present for the ceremony, including the federal minister of transport Friedrich Zimmermann, the federal minister of research Heinz Riesenhuber and Bundesbahn CEO Reiner Gohlke. Delivery of the first 41 trainsets was planned to be completed by April 1991, while in early 1989 complete delivery had been planned for September 1991. Commissioning of the first vehicle began shortly after delivery, with one power car being delivered every week. After some initial delays, delivery was back on schedule by spring 1990. By the end of May 1990, 35 power cars had been delivered. In the spring of 1990, 401 015 and 401 515 were delivered, which were the first power cars equipped with additional pantographs for service in Switzerland.