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:
Cheap running that respects the environment
Environmental protection has been one of the guiding principles in the production
of the Fiat Doblò. It is no accident that its pollution control equipment is much
more effective than that ...
Recommended Shift Speeds
To use your manual transmission for optimal fuel economy, it should be upshifted
as listed in the following table
...
Body Lubrication
Locks and all body pivot points, including such items as seat tracks, door hinge
pivot points and rollers, liftgate, tailgate, sliding doors and hood hinges, should
be lubricated periodically with ...