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Automatic arming/rearming of the alarm
Automatic rearming of the alarm prevents the car being left with the alarm disarmed unintentionally.
The alarm alerts e.g. in the event of a break-in in the car.
Disarming the alarm without working remote control key
The car can be unlocked and disarmed even if the remote control key does not work, e.g. if the remote control key's battery is dead.