89 BMW 535i door lock mechanism is not responding to the key to open the doors Have had this problem before when there was no power to assist the mechanism Any answer on how to manually open the doors?

when you turn the key in the passenger door lift the handle at the same time turn the key fully to left on a right hand drive beamer you should now be able to get in.

I have a 525i and I was told by a BMW tech that even if you do not have power to open the doors you can manually use the key on the passenger side door by turning it pas the normal area it will unlock that door. I have read that the early E34 series cars have issues with the mechanisms in the doors that unlock the doors. Does this happen to all doors or just some of them?