 FCA subsequently announced Marchionne had taken medical leave for shoulder surgery at the University Hospital of Zürich in Switzerland — adding on the day of surgery that he would not return due to post-surgical complications.After further serious complications, on July 21, 2018, Marchionne resigned from all his positions and was replaced at FCA, Ferrari, SGS and CNH.He died on July 25, 2018, at age 66, most likely from complications related to underlying cancer.