chiefmechanic

My daily driver is a 1998 a4 b5 Tdi Quattro saloon. It has 136,345 miles atm. My problem is that the battery goes flat overnight. Can anyone tell me how to check for whatever is draining the battery. I have tried a different battery and the same thing happens. Vcds shows no faults. All help welcome. Brian

chapindad

I just got my audi. But I had this problem of my old corvette. It is almost always an accessory that is shorting out. I started by pulling fuses until I narrowed it down. My problem turned out, water was getting into a connector in the wiring harness.

Later

tenspeed

This video is pretty good about finding parasitic power drains.