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:
27. Fuel Gauge / Fuel Door Reminder
The fuel door reminder indicates that the fuel filler door is located on the
right side of the vehicle. When the ignition switch is in the ON/RUN position, the
digital scale will show the level of ...
Body and underbody warranty
Your Fiat Punto is covered by warranty against perforation due to rust of any
original element of the structure or body. For the general terms of this warranty,
refer to Warranty Booklet booklet. ...
Seat Bel
Inspect the belt system periodically, checking for cuts, frays, and loose parts.
Damaged parts must be replaced immediately. Do not disassemble or modify the system.
Front seat belt assemblies must ...