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:
Failure warnings
In case of parking sensor failure, the driver is warned when engaging reverse
by high sound warning (for 3 seconds). ...
13. Power Steering System Warning
This light is used to manage the electrical warning of the EPS (Power Steering
System).
Refer to “Power Steering” in “Starting and Operating” for further information. ...
Cylinder replacement procedure
To replace the cylinder proceed as follows fig. 16h:
– disconnect connection A; turn counter-clockwise the cylinder to replace and
raise it; fit the new cylinder and turn it clockwise; connect conn ...