This light will illuminate when there is an automatic transmission fault.
See also:
Emergency start-up
If the Fiat CODE system fails to deactivate engine immobilising system the warning
lights Yand U stay on and the engine cannot be started.
To start the engine the emergency start-up can be performe ...
Chassis
...
Heated rear window
The warning light on the dial turns on when the heated rear window is turned
on. ...