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Seams that the answer to this unfortunate incident, according to the dealership is to "break a glass of choice" to access the hood release handle; which is the only thing that does not go into "deadbolt lockout" which prevents pulling any and all lock linkages. Once inside your hood, you can jump your battery from the battery positive point and negative tower screw affixed to the strut tower top cover. I was then informed that one has to install and exterior weatherproof cigarette lighter socket in a hidden area, as so that you may regain access if the incident should ever re-occur !!

I would use the key to unlock the door.

A BETTER WAY: Insert key in door. Lift handle all way up. Turn key all the way forward, past horizontal. (Resistance may be felt at horizontal, but apply reasonable torque without twisting key off.) Door should now open. If this does not work, open trunk, remove trunk light lens, run 12 volts to bulb socket, red to positive and other wire to neg. This runs power to car electrical system because trunk light circuit opens when trunk lid is raised. Don't confuse license plate light, which is also in the trunk lid, for trunk light. There is no open circuit to license light with light switch off.

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You can also insert the key into the trunk key slot and manually open the trunk, even when the battery is dead. Then you can replace the battery, everything else works.

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Q: How to unlock BMW 740 when battery is dead?
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