Car sat in the garage for 2 1/2 days and wouldn't start. No lights, nothing. Jumped it and began trying to find a parasitic draw with both a test light and then a multimeter (amps) on the negative side of the battery. I pulled rows of fuses and would check to see if the light would go off and then if the amps (drawing 4-7) would drop. Pulled every fuse for each test and nothing changed, light stayed on every time and amps never dropped. My radio had been "going out" for a second or two a couple times the past few months and last week it went out completely for an entire drive home. for the most part it has worked fine though. The radio was therefore my initial guess as to the problem but like I said, pulling the fuses had no effect on anything. Any ideas/suggestions? Oh, the battery is only two years old so I figured its not just a bad battery...

 

If you have access to an Autozone or equivalent, they will perform a free alternator and battery test. I have not had battery issues with my Audis, but they crop up a lot with Crossfires (I have 2) that are basically SLK320s.