Turning the key to MAR the warning light on the dial turns on, but it should go off as soon as the engine is started.
If the 
warning light turns on when
the car is travelling (on certain versions together with the message on the display),
stop the engine immediately and contact a Fiat Dealership.
See also:
High Beams
With the low beams activated, push the multifunction lever towards the instrument
panel to turn on the high beams. Pull the multifunction lever toward the steering
wheel to turn off the high bea ...
LATCH — Child Seat Anchorage System (LowerAnchors and Tether for CHildren)
Your vehicle is equipped with the child restraint anchorage system called LATCH,
which stands for Lower Anchors and Tether for CHildren. The LATCH system provides
for the installation of the child ...
Air Bag Warning Light
You will want to have the air bags ready to inflate for your protection in a
collision. The Air Bag Warning Light monitors the internal circuits and interconnecting
wiring associated with air ba ...