Website Autosport.com reports Former Ferrari chairman and CEO Sergio Marchionne has passed away at the age of 66, just days after the company announced a succession plan.Marchionne had entered hospital for a shoulder operation, but after surgery his condition deteriorated rapidly, with reports suggesting that an embolism had led to a coma. In a statement issued on Wednesday Elkann, the grandson of former Fiat boss Gianni Agnelli, said: "Unfortunately, what we feared has come to pass.