Texx
Super Moderator
the central door locking on a ep82 work off the key in the drivers door, on the drivers side it will unlock both doors but if you unlock the car from the passenger door it will only unlock the passenger door, so you need to have a door motor fitted the passenger door.
There is no need to fit any additional components for an alarm to operate the central locking and lock both doors. If someone try's to sell you something, either they do not know what they are doing or they are trying to have you over.