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Dmitry

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  • First Name
    Dmitry
  • Location
    Poole
  • Audi Model
    Audi A8 D3
  • Audi Year
    2010

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  1. Please help identify a battery draining problem. Audi A8 D3 2010. There was a problem with a rain water leak which was fixed a few days ago. The water came from the windscreen which detached from the car body. I removed the carpets and there was lots of water underneath which dried out now. I suspect the water leak was there for the long time as I often noticed excessive dampness in the car. The problem itself is the car often doesn't shut down (get into sleep mode) when I lock it. The Start/stop buttons, the triangular hazard warning button and the gear lights stay illuminated. Looks like it has a mind of its own as sometimes it shuts down in half an hour, sometimes in an hour etc but most of the time it stays on until the battery is drained enough for the power control unit to switch off the power. This problem started over half a year ago but wasn't as bad as now. Went to a garage and they suggested replacing Central Convenience Module and the Battery Control Module which was done without any success. Then I discovered the water under the floor and thought that it must be the cause of the problem. I found two modules under the floor that potentially might've got some water inside: Onboard power supply control unit (4EO 907280D) and Keyless Kessy Entry Control Unit (4E0907181A) I even opened the Onboard power supply control unit but it looked fine and dry. The water leak was fixed 4 days ago and it all looks dry in the car but the power problem is still there. Any suggestions please?
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