Sergio Marchionne

Susan Stephens / WNIJ

Fiat Chrysler Automobile announced Saturday that CEO Sergio Marchionne's health had suddenly deteriorated following surgery and that its board of directors had chosen Jeep executive Mike Manley to replace him.

Marchionne, a 66-year-old Italian-Canadian, joined Fiat in 2004 and led the Turin-based company's merger with bankrupt U.S. carmaker Chrysler. Manley, 54, had been heading the Jeep brand since June 2009 and the Ram brand from October 2015.

Susan Stephens / WNIJ

The much-heralded Dodge Dart should be in dealerships by the end of next month. To celebrate, Chrysler Group CEO Sergio Marchionne visited the home of the Dart Thursday -- the Belvidere Assembly Plant.