Merry was eventually chosen abbot of the monastery, much against his will. As abbot he preached by example and the reputation of his sanctity spread throughout the country. He was always aware of the temptation to become prideful due to his position so when he found himself becoming quite popular amongst the monks and lay people he fled to a forest four miles from Autun. He lived here for several years, living by the work of his hands.
His hideout was discovered at the same time that he fell ill, forcing him to return to the monastery. In his old age, Merry led the monks on a pilgrimage to the shrine of St. Germanus in Paris. He lived in Paris for some time with St. Frou (Frodulf) in a cell next to a chapel dedicated to St. Peter. It was in this cell that he suffered for 3 years from a painful illness before passing away peacefully in 700 a.d.