Car door unlock and lock by itself

I don't understand the question, but sometimes, newer cars give you time to auto u lock in case you leave a child unattended in the car.

Can you give a check to the micro switch that is connected to your boot lock?
If the catch gets stuck, open your drivers door, leave it open,reach across & press down the lock on the passenger front side. The locks will lock/ unlock themselves, because they sense a door is open. Repeat this action until you hear the boot unlock. Also, keep your battery well-charged.
Let us know if this helps!!

sounds like an intermittent short in the wiring, a good place to start looking is where the loom goes through the door by the hinges, this is a place where the get a lot of wear, start with the drivers door and remove the door panel and check for any obvious chaffs in the wiring, (maybe give it a little wiggle).

replace IC of car door lock... this is a little black box inside the steering wheel cover

door switch is bad

Watch these three videos ! Door Locks Go Crazy 1

Door Locks Go Crazy 2

Door Locks Go Crazy 3

take it down to the dealers as they will do a diagnostic test fer around $20 and tell you whats wrong and how to fix it.

Your car has a security function, which assures that the vehicle is locked when left without driver for a while. Same happens if you unlock the doors with the remote and don't open any doors for a few minutes. The doors will lock themselves.

An auto Electrition will bypass the alarm for you.As a temporary mesure remove the battery earth lead and leave off for 6 hours..

The fuse is No.3 "DR locks" (near steering wheel)
If you take the fuse out the doors will not open itselves.

The root cause of the problem will be a microswitch inside the drivers door?

Check this:
http://www.ptdoityourself.net/tl/tl_index2.html#8n

======FOG LIGHTS ============

1.At first take out the foglight's fuse before you battery is dead. (Fog lights stays "ON" even you leave the car).

2.You must replace the Multifunction control switch =(

Here is the photo of problem:
http://www.ptcruiser.fi/ptgalleria/albums/userpics/10010/normal_sumuvalokytkin.jpg

Fog lights are connected to pin 13,14.
Fog light switch is "B". Because the current is many Amps, contact surfaces are heating up.
After that the contact opening "C" is melting (made of plastic) so the fog light stays "ON".