From outside the vehicle

The remote key locks and unlocks all of the doors and the trunk.
Before the vehicle can be locked from the outside with the remote key, the driver's door must be closed. Any other door/trunk that is open will be locked and the alarm will be armed.
NOTE
Be sure the remote key is outside of the vehicle before the other doors/trunk are closed to help avoid locking the remote inside the vehicle.
If the vehicle is equipped with the optional keyless drive system, all doors/trunk must be closed before the vehicle can be locked.
The first press on the unlock button unlocks the driver's door and a second press unlocks the other doors and the trunk (see also page 57). This setting can be changed in the menu system, see page 134.
If the locks repeatedly do not react when the unlock button is pressed, it may be necessary to replace the batteries in the remote, see page 56. In this case the vehicle can be unlocked with the detachable key blade. See page 60.
See also:
Turning off (stopping) the alarm
If the alarm is sounding, it can be stopped by pressing the Unlock button on
the remote key or by inserting the remote key in the ignition slot. Two short flashes
from the car's direction indi ...
Windshield wiper service position
The windshield wipers must be in the service
position before the wiper blades can be
cleaned or replaced. See page 329 for additional
information. ...
Living With the C30
You'd be forgiven for thinking "hatchback = practical," but that's not quite
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