The warning light on the dial comes on (on certain versions together with the message on the display) when dieel fuel filter sensor failure is detected. Contact Fiat Dealership as soon as possible to have the fault removed.
See also:
Engine Oil Filter
The engine oil filter should be replaced with a new filter at every engine oil
change.
Engine Oil Filter Selection
All of this manufacturer’s engines have a full-flow type disposable oil filter.
...
Controls
(A): Air temperature knob (mixing hot and cold air)
(B): Air recirculation on/off button
(C): Fan knob
(D): Air distribution knob. ...
Information about car conditions (at event)
❒ Scheduled maintenance programme intervals.
❒ Trip computer information.
❒ Light adjustment of graphics/index/instrument cluster display and twozone climate
control system (w ...