Audi S3 Quattro facelift circa 2002 with standard Audi Symphony radio unit and Bose sytem.
Some time ago lots of distortion out of left hand channels and bass woofer thumping when turned on. This falttened the battery on several occasions when car left at airport due to days away travelling. Bass woffer thumping stopped of its own accord and no more flat battery issues.
Still loads of distortion though and simply eft unit off and listened to the engine instead !!
Now however the darn radio/CD unit will not switch on........but the backlight in the display screen stay permanently on as do all the seection dials and knobs.No amount of bashing shouting key turning on/off switching makes any difference. This is again eating the battery and is a pain.................suggestion most welcome.
Is there a main fuse to the unit. I am remote and do not have tools, garage or other niceties at hand.