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You need power to open it, so you'll need another bettery and jump leads. Open the bonnet (US: hood) and look for the large connector marked with a "+" sign. Connect the positive lead to taht and the negative to the chassis (any clean connection). You can now use the normal opening method.

You can unlock the doors manually if you turn the key far enough. You can then open the hood and provide power to the vehicle with jumper cables and a donor car. If all else fails you can jack the vehicle up, support it on a jack-stand, and attach a red jumper cable to the starter positive red cable where it connects to the starter and then attach black cable to any metal place on the engine. You can use this procedure to charge the battery with either a battery charger for jumper cables from a donor vehicle.

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βˆ™ 11y ago
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Q: How do you open trunk in 525i BMW when your out of battery?
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