This has been said before but just wanted to add my own experience. I needed to open the door on a X5 at Pick'N Pull to remove the side passenger mirror.

I can confirm as other have said that it is possible to remove the door panel with the door closed (front passenger).

The rod trick wouldn't work for me. After removing the side airbag, I had good access to the mechanism but was unable to push it.

What finally worked for me was to apply 12V current to the actuator. I believe it was the blue wire and one of the white one. That finally unlocked the door and I was able to open it.

Thanks!