Audi A4 2005 3.0 litre, manual transmission 165000 miles
It was minor at first, a slow drain over a week, when the car was locked and car alarm active. If the the car was unlocked, for a month, it was fine. In the last month, it's gotten much worse.
The battery is about three(3) years old. After being on a battery tender overnight, the battery would show 12.9 volts. Idling it would show ~13.4 - 13.5 volts.
Now if the car is locked the drain is rapid, over the course of three hours(3), it had to be boosted to re-start. If the car is unlocked overnight, there's still a battery drain, and the car must be boosted to start.
Was yours resolved?