Audi A6 2.0 ABK engine 1995 125,000 miles
My Audi starts up fine from a jump start but will not start by itself. Even if I drive it 100 miles, charge the battery overnight, if I leave it in the car (disconnected) or whatever, it turns the engine a few times and then runs down. I have changed the battery and it still does it. The one thing I've noticed is that the air flow meter makes a really loud buzzing noise when I turn the key to the ignition position. Its as if its draining too much power from the battery. Either that or the alternator is not charging the battery properly - although the volt meter reads 15 volts when the car is idle.