Hi everyone, strange thing happened to me recently:

I discovered that my rear tails where ON in the morning after a cold night (around 5 degree F). This happened to me 2-3 times and it had drained my batterie completely! But this only happen when it's cold outside. When the car is in my heated garage, this won't happen.

And this is not the known issue of the brake light switch, because only the rear tail are ON (found nothing on the web about that issue) I have disconnected my trailer converter (thought this was defective) but my issue still happen randomly (not every time)

Took a look in the wiring diagram and I was suspecting the J519 electric control module to be defective. Does this happened to someone here on the forum? I opened the J519 and found nothing relevant: no moisture or dirt inside...

A4 B7 2.0T 2006 W/95K MILE

Thanks!