Ok i don't know if this is a fix or not. I had the same problem with the three beeps when my audi started only at the beginning of each morning. I took my audi to the dealership for other issues and told him about it and also told him that my car was always dead when it sat for two weeks. He told me they would look at it and they did. They hooked a battery tester up to my car and found nothing. They did more extensive searching and tested the battery with another tool and found that one of the cells in the battery was periodically shorting the rest of the battery out. This was draining the battery on my security system. They replaced the battery and the beeping continued but only for two weeks. Once the security battery becamse charged it stopped all together and i haven't heard it since. Hope this helps.
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