 Trial passenger operations commenced on Hamburg - Würzburg - Munich services on 31 October 2016 with full service expected from December 2017.On 26 September 2018, the DB board approved the purchase of 18 additional seven-car trainsets and 50 individual cars to be added to trainsets then on order.On 4 April 2019 it was announced that due to problems with the carriage frames of the ICE 4 trains, Deutsche Bahn will not take delivery of any further trains for now.