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:
Vehicle Storage
If you are leaving your vehicle dormant for more than 21 days, you may want to
take these steps to protect your battery.
• Disconnect the negative cable from the battery.
• Anytime you store your ...
Deactivation
Turn the ignition key to STOP.
At the following starting operation (key at MAR), the sensor will not be reactivated
even is the stalk is on (B). In this event, to activate the rain sensor, you have ...
Locking Doors With A Key
You can insert the key with either side up. To lock the door, turn the key to
the right. To unlock the door, turn the key to the left. Refer to “Body Lubrication”
in “Maintaining Your Vehicle” for ...