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In page Tilting train:

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Rather luckless was Class 411/415's adaptation for diesel services. In 2001, a total of 20 units were commissioned for use on the Dresden–Munich line, but these class 605 (ICE-TD) units experienced trouble from the start. After breaking an axle in 2002, all remaining 19 units (one fell off a working platform) were taken out of service. Even though one year later the trains were admitted to service again, DB judged their operation to be overly expensive. In 2006, those trains were used for amplifier trains and from 2008 to 2017, they ran on the Hamburg–Copenhagen route. Since 2018 and 2021, two units are in operation as the advanced TrainLab test train.[citation needed]