By the I'm not sure if you have already mentioned it. When this happens and you disconnect battery, what if you connect the battery back right away, what happens? Is everything back to normal or still powered?

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E39 530dA -02 M-Sport Messing metallic
E53 X5 3.0dA -06 Sport Stratus grey
E70 X5 40d -12 M-Sport Space grey