Major milestones were reached in May and July 2012 as full automation reached sufficient levels by which the MP 89 were no longer needed during late evenings and weekends respectively. For the "Nuit Blanche" during October 2012, Line 1 also operated in full automation. The final milestone was reached on 15 December 2012, as full automation of Line 1 approached 100%, allowing the remaining MP 89 trains to be pulled from regular service on 21 December 2012. Due to insufficient storage space on Line 4, the remaining 6 to 7 MP 89 trains remained stored on the Line 1 tracks near Fontenay until a new garage in the Montrouge area opened. That opening was tentatively set for February/March 2013 and will coincide with the opening of the new Mairie de Montrouge station opening on Line 4.