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:
Parking sensors (where provided)
Parking sensors are located in the rear bumper to detect and inform the driver
(through an intermittent acoustic signal) about the presence of obstacles behind
the vehicle.
ACTIVATION
Sensors wi ...
Parking
Switch off the engine, pull up the handbrake and engage a gear (1st gear or reverse,
according to whether the vehicle is facing up or downhill) and leave the wheels
turned. If the vehicle is left ...
Front fog lights
(green)
The warning light turns on when the front fog lights are turned on. ...