I have been having issues with battery drain recently and seem to have narrowed it down to Fuse F18 (Audio Amplifier) I do noticed that I still get a hiss from the speakers even when the car is turned off. Removing this fuse also removes the hiss. I am wondering if this hiss is normal with BOSE setup even when car is switched off? I cant say I have ever noticed it before.
AUDI S3 8P2