Min, I have crawled the entire interwebz for an answer to that question. I've hit and run a couple of Audi forums for some advice. The leak is so slow that it takes 5 months. I have the battery on a conditioner every other night, and whatever is causing the problem gives the battery a memory, because it'll read like it's giving out enough voltage, but the amperage isn't there to crank the car, or even run the accessories when it's done. There are 2000 electrical components that it could be, from the radio to the memory function on the mirrors/seats, and my mechanic said it could take him 3 weeks working on it every day to find it, then he's gotta fix it. Said it'd pretty much total the car.
"There remain four irreducible objections to religious faith: that it wholly misrepresents the origins of man and the cosmos, that because of this original error it manages to combine the maximum servility with the maximum of solipsism, that it is both the result and the cause of dangerous sexual repression, and that it is ultimately grounded on wish-thinking." ~Christopher Hitchens, god is not Great
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PM me your email address to join the Slack chat! I'll give you a taco(or five) if you join! --->There's an app and everything!<---