The DB Class 614s are German diesel multiple units operated by the Deutsche Bundesbahn, comprising two Class 614 driving units and up to two Class 914 centre cars. On 1 January 1994 the ownership of these vehicles was transferred to the DB's legal successor Deutsche Bahn and its subsidiaries or business areas. The Class 614 is a direct evolution of the Class 624 / 634 and only differs from them in a few points of detail. As a result, the technical section will only cover these differences.