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:
Audio repetition (Audio Rpt.) (where provided)
With this function the display repeats information relevant to the Radio (selected
radio station frequency or RDS message, automatic tuning or AutoSTore), audio CD
(track number).
...
Auto-Down — If Equipped
The driver’s door window switch may have an Auto- Down feature. Press the window
switch for approximately one second, release, and the window will go Power Window
Switches 2 THINGS TO KNOW BEFORE ...
How to keep the seat belts always in efficient conditions
Observe the following:
❒ Always use the belt with the tape taut and never twisted; make sure that it
is free to run without impediments;
❒ After a serious accident, replace the belt ...