The warning light on the dial comes on (on certain versions together with the message on the display) when the "Follow me home" device is activated (see "Follow me home" in the "Dashboard and controls" section).
See also:
Engine
...
“Dualdrive” electric power steering system
The electric power steering only works when the ignition key is at MAR and the
engine is running. A new electrically controlled power steering system called “Dualdrive”
is fitted on the Fiat Pun ...
Heating/climate control system
Version with central dashboard unit
A - Fixed side vents - B - Adjustable side outlets - C - Fixed upper vent - D
- Fixed central vent - E - Lower vents
Version with central tunnel unit
A - F ...