See also:

Malfunction
A message is displayed in the instrument cluster. HDC is not available, e.g., due to elevated brake temperatures. ...

Owner's Manual for Vehicle
Thank you for choosing a BMW. The more familiar you are with your vehicle, the better control you will have on the road. We therefore strongly suggest: Read this Owner's Manual before starting off ...

Arming and disarming the alarm system
General information When you lock or unlock the vehicle, either with the remote control or at the door lock, the alarm system is armed or disarmed at the same time. Door lock and armed alarm sys ...