Its an Opel Astra (aka. Saturn Astra, Vauxhall Astra, Holden Astra) 1996 year. The problem is with central locking. It used to be remote controlled, but a couple of months ago the remote's battery was gone (probably) and I open the doors by inserting key into driver's door, and all the locks used to pop up.
But since yesterday, I have noticed that only driver's door would open with the key, and others won't open even by hand :( Seems like the driver's door opens mechanically with key and central locking is all dead.
Remote is not too important for me, if I can open all the locks by inserting key into driver's door lock, that's fine. Any suggestions how to fix it? Does it need a new central locking control unit only or any other parts also need to be changed? Any idea where exactly is the control unit located?