Ive not been able to measure the drain as I dont have a clamp meter, but didnt find any voltage drop across any of the blade fuses, though looks life there's a few I havent tested.
Engine off, the voltage is around 12.6v after a good drive, though I have seen that low a voltage whilst I was driving- 4 hours in to a long journey which I suppose is what has made me wonder about the charging side of the system.
Hopefully, a few days watching it with the proper VAS tool should help get to the bottom of it, as it seems like its normal for the charging voltage to be lower than the 14v I would expect to see.
Thanks for all your advice
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2004 A8 3.0 TDI Sport Brilliant Black
Came with: Black Valcona/Alcantara Leather, KESSY, rear blind, flappy paddle gear change, Phone Prep, TV
Added:Bluetooth, AMI, Hybrid TV, Parking plus, Ski hatch, towbar, DAB, Umbrella Holder, Reversing camera, Auto lights, Wheel refurb
Things to fix: Turbo fault, power drain
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