The options are:with the key's buttonsusing the detachable key blade (if the battery in the key is discharged)keyless* (the car detects that a key is within range)from the inside of the car using the locking controls in the doorsremote door unlock (RDU) with Volvo On Call*automatic locking when the car is driven. NoteIn the event of a collision, the car unlocks all doors for safety reasons. This only happens if any of the safety systems have deployed.