I did try the emergency open procedure, no luck. I don't believe the child lock was activated, but it is a remote possibility. When last the door opened, mu wife was putting in a car seat for one of the grand kids, so it is conceivable she accidentally engaged it. My over-enthusiastic granddaughter was trying to open the door at the same time I was hitting the unlock button, and that was when it ceased functioning. I'm guessing this was purely coincidental. Anyway, while there is a lot to like about the E53, I am not a fan of the doors.....

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Chief

2004 3.0 6 speed manual