The battery is of the “Limited maintenance” type: under normal conditions of use the electrolyte does not need topping up with distilled water.
CHECKING THE CHARGE fig. 22
The battery charge may be checked satisfactorily through the inspection slot using the indicator and acting according to the color the indicator shows.
Refer to the table below or to the plate (see figure) set on the battery.

The liquid in the battery is poisonous and corrosive.
Avoid contact with eyes and skin. Do not bring naked flames or possible sources of sparks near the battery: risk of fire and explosion.
Running the battery with low fluid level can damage the battery beyond repair
and could also cause its explosion.
See also:
Lower vents
(C) - (D) Fixed vents for conveying air to the footwell. ...
Automatic Transmission – If Equipped
The automatic transmission and differential assembly are contained within a single
housing.
The fluid level in the automatic transmission should be checked whenever the
vehicle is serviced. Opera ...
Installation of electric / electronic devices
Electric/electronic devices installed after buying the car or in aftermarket
shall bear the and marking:
Fiat Auto S.p.A. authorizes the installation of transceivers provided that installation
...


