Self Locking Car

[winnie]

I press the key fob to open my C5 estate 2001, open the tail gate, put any item in it, close the tail gate.

I walk round to the drivers door and its locked.

I have to press the key fob again.

Why dose it do that?

 

[MikeLane]

Don't know why it does it when you open and close the tailgate but, if the car is unlocked and a door isn't opened withing 10 - 15 seconds the car relocks itself.