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:
Brake System
In the event power assist is lost for any reason (for example; repeated brake
applications with the engine off), the brakes will still function. The effort required
to brake the vehicle will be si ...
Car protection system failure - fiat code
Turning the key to MAR the warning light on the dial shall flash only once and
then go off. If with the ignition key at MAR the warning light stays on, this indicates
a possible failure (see “Th ...
Anchoring the load
A boot mat is provided (optional for Fiat Doblò Cargo base versions). To fasten
the load, fastening hooks are provided (quantity varying according to versions)
fig. 132 secured to the floor ...