The warning light on the dial comes on (on certain versions together with the message on the display) when dieel fuel filter sensor failure is detected. Contact Fiat Dealership as soon as possible to have the fault removed.
See also:
Speedometer
The speedometer A-fig. 31 - 32 shows the vehicle speed.
...
In the 50 United States and Washington, D.C.
If you believe that your vehicle has a defect that could cause a crash or cause
injury or death, you should immediately inform the National Highway Traffic Safety
Administration (NHTSA) in additio ...
How to warm up the engine after it has just started (petrol and diesel versions)
Proceed as follows:
❒ Drive off slowly, letting the engine turn at medium revs. Do not accelerate
abruptly;
❒ Do not drive at full performance for the initial kilometres. Wait until ...