sentences:  Whereas the successor class 614 units supplemented DB's DMU fleet, the class 628.2 regular types coming into service after 1986 began to displace class 624 into subordinate services.Retirement of class 624/634 trainsets started in 2003, when DB lost a couple of tender procedures to private companies and modern light-weight DMUs came into service in large numbers.The last class 624/634 units were retired in 2005.