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:
Fuel reserve
Turning the ignition key to MAR, the warning light on the instrument panel shall
turn on but it should go off after a few seconds.
The warning light turns on (on certain versions together with ...
Device engagement
Turn knurled ring (A) to ON.
The device may only be engaged in the 4th or 5th or 6th gear. Travelling downhill
with the device engaged, the car speed may increase more than the memorised one.
Wh ...
Fuel System Cautions
CAUTION!
Follow these guidelines to maintain your vehicle’s performance:
• The use of leaded gas is prohibited by Federal law.
Using leaded gasoline can impair engine performance and damage the ...