My 2001 Audi A6 2.7 has battery drain problem and I could not start the car at airport twice after leaving it there for 10 days after I got a new alternator and a new battery last November: one time the weather was below 20 after my family returned from Florida last December and it was awful. I brought the car to dealer. After checking, they told everything is normal and recommended I have a backup jump battery. I could not believe I spent $60 for nothing!

After seeing this post by gtzpower, I bought a multimeter and decided to do some troubleshooting as well this weekend. I put mulitmeter between negative wire and battery minus end. multimeter reads 181 mA with all the fuses present and 144 mA with all the fuses out. I feel like that this is the problem. Should the current be close to zero with all the fuses out?? As soon as I disconnected the wire which goes into the car toward driver side, multimeter reads 1mA. According to the post, anything over 50 mA flags a problem. Anyone has idea about what kind of problem I am having?

Also, I expect that my radio would go to safe mode after having disconnected the battery but it didn't after putting battery back on.

I really want to get this problem fixed. Any help is sincerely appreciated!!

Mike