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That's a heck of an interesting problem.

I can think of only 3 possible solutions:
1. You are holding the key in your hand and pressing the trunk button while trying to close the trunk. this seems unlikely, but would cause the issue :)
2. You have a wiring short, probably in the area where the wires pass from the trunk lid to the body,
3. The brain in your central locking module has come in contact with HAL2000 and no longer likes you -- or is failing...

My money is on #2.

d-
 

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Electrical release is in the trunk lid. Remove the 2 "push pins", the vanity cover (little rectangular piece), and the screw under the vanity cover to get the trim off.

You should see the latch (1 piece) and the operating bar attached to it...

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That's the problem with cars - the whole thing is a ground, so any bare power wire will cause you huge problems.

**Nevermind - plate light goes directly to LCM** Items like a trunk or a door usually have a Molex connector. This is basically a connector that is designed to flex and take the constant abuse associated with opening and closing. The nice thing about these connectors is that they have a plug on each side (to allow the molex to be replaced instead of having to run an entirely new harness. Look on the trunk side where the wire comes through and see what you can find. You obviously won't be able to disconnect it lid side, but you should be able to get to it on the trunk by removing the trunk lid liner (and possibly one side liner as well). **No such luck**

The other option is to pull all the fuses related to that part of the car. This likely would include your power door locks and rear lights. If you are lucky, the plate light is on a separate circuit from the taillights, but I wouldn't hold your breathe.

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Doug, thanks for the response.

the damaged wiring goes through the rear firewall and not sure where after that.
wtf is a "rear firewall"?

Who knows where the molex connection is?
See my edit - there isn't one.

I am going to try and pull some of the fuses and see if I can get these wires to become powerless.
Good plan...
 

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No, you really can't hurt anything by pulling fuses, but I'd start with the ones that look right based on the fuse diagram :) Don't forget there are fuses in the right rear as well - the ones you want may very well be back there.

As for the "sealed passage", I'm not at my car, but you should be able to get at the wire by either a) removing the trunk top liner or b) removing the rear deck. It has to go somewhere relatively easily accessible or the BMW techs couldn't fix it either!

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