While rivals rolled out new models and concept cars, Fiat had little to display at the Paris auto show besides the 500X in what is starting to look like a worrying trend for the carmaker’s namesake brand.Following the full takeover of U.S. unit Chrysler, the newly-named Fiat Chrysler Automobiles (FCA) has set out an ambitious growth plan focused on its upmarket Alfa Romeo, Maserati and Jeep brands.