locked out

i have an 88 750il the battery died and i cant get into the car the battery is under back seat but the key wont open the door is there any other way 2
get in or charge battery? please help!
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If you can get into the boot (trunk), remove the lamp from the courtesy light inside and connect a low current battery charger (<2A) to the wires. Make sure you get the polarity correct. Leave the boot lid open. You should get enough charge into the battery overnight to be able to operate the central locking.
JB
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JB wrote:

Actually, as soon as the trickle charger is hooked up there may be enough power to the door locks to open the doors, assuming the battery isn't completely flat
--
-Fred W
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The key won't open the door? Which door?
The driver door and the passenger door are locked mechanically, and are operated by the key when the battery fails. Even if the battery works, the door that has the key in it will open because of the key.
Now, it's possible that the Ignition Lock Set was changed, and the key doesn't match the door anymore. If this is the case, you're hosed.

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battery
2
There's a part in the door that breaks, so that you can't open with the key any more, mechanically. Even if you do the lift-handle trick. But try that on both sides first.
Failing that, open the trunk with the key, and jumper a battery in through the trunk light leads. That should get you enough power to actuate the power locks with the key from the doors.
-Russ.
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I have heard of this many times.... do the trunk light trick and you'll be fine. I don't know what year they started this.

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