When the car is locked, some functions and systems are either shut down or activated to help protect the car from theft.
Warning
Do not leave your keys unattended in your car. They can be used to disable the security systems.
Immobiliser
The immobiliser is an anti-theft system that prevents your car from being driven until it's started using a valid key. If your car can't find the key or fails to authenticate it, your car will remain immobilised. If the key can't be found or has a low battery, a notification appears in the centre display.