The DBAG Class 612 is a two car, tilting, diesel multiple unit operated by the Deutsche Bahn for fast regional rail services on unelectrified lines.

[1] The Class are a two car tilting DMU built between 1998 and 2003 by Adtranz in Hennigsdorf which later became Bombardier Transportation.

The sets worked fine between 1998 and 2004 until cracks were detected in a number of wheelsets and so the tilting system was disabled and curves on lines had to have reduced speed limits, which affected the timetables and connections.

From 2005 the trains had the wheelsets replaced and the tilting system was back up and running.

After ICE TD class 605 was grounded due to a fracture of an axle in one unit, it was replaced by class 612 on the Dresden-Munich line 2003, as replacement by anything other than a tilting DMU would have meant an extension of travel time.