The warning light on the dial turns on (on certain versions together with the message on the display) when one or more doors, the boot (indication fitted on some versions only) or the bonnet are not properly shut.
Symbols 
shown on the multifunction
display indicate incomplete left/right door closing.
With doors and boot open, if 4 km/h speed is exceeded the buzzer will sound (only for versions with reconfigurable multifunction display).
IMPORTANT On versions not fitted with electric door lock, no warning message will be displayed if door is not perfectly closed or is left open.
See also:
Central door locking system
From the outside
With the doors closed, fit and turn the key in one of the front door locks.
From the inside
With the doors closed, press (to lock) or lift (to unlock) one of the front door
knobs ...
Headlight adjustment abroad
The dipped beam headlights are adjusted for circulation in the country in which
the vehicle is marketed. In countries with opposite circulation, to avoid glaring
oncoming vehicles it is necess ...
Glow plugs
Turning the ignition key to MAR, the warning light on the dial comes on and goes
off when glow plugs reach the preset temperature. Start the engine immediately after
warning light switching off. ...