Alarm issues

[sibok]

Hi does anyone know what this button is supposed to do? http://cgi.ebay.com/CITROEN-XANTIA-SAXO-ALARM-SWITCH_W0QQitemZ230129576851QQihZ013QQcategoryZ103 76QQrdZ1QQcmdZViewItem
When i bought the car the seller took out the car alarm and this switch. Now i'm trying to install an alarm but i have problems with the central locking. So i have a few questions. I have a saxo 16v year 99 full equip. My questions are:

What is this swith supposed to do? armi/disarm? also lock the car from inside? what?
Then, when a lock the car it only locks all doors when locking the car from the drivers side, so if i lock/unlock the car from the "no driver" side it only locks/unlocks this door. Is it normal?

I'm just trying to deduce what have been deactivated due to the alarm extraction.

[sibok]

Does also anyone know where i can get a user and technical manual?

[DAN-VTS]

That switch is to do with the ultrasonics for the alarm. With that switch you can turn them off.
You can get a haynes manual from halfords etc

Also your door locking question, that is normal. When the doors are locked the passengers door can be unlocked without the drivers side unlocking