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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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11y ago
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Q: How do you open the boot on a BMW 840 with dead battery and no key?
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