 The entry into service of the Mark 4 stock allowed the Mark 3 coaching stock to be cascaded to other routes, allowing in turn the withdrawal of the elderly "Cravens" and Mark 2 coaches.In 2007, the first of a total 183 coaches of the new 22000 Class diesel multiple unit were delivered, of which 150 vehicles are for InterCity services, the remaining for use on Commuter routes, at a total cost of approximately €400 million.These trains, which are in 3-car, 4-car and 5-car formations, replaced the Mark 3 coaches formerly in use on the routes between Dublin and Limerick, Galway and Waterford and the 2800 Class and 29000 Class DMUs on the Dublin to Sligo and Dublin to Rosslare Europort services, and on the services that do not terminate in Dublin.