Originally Posted by jmh
Hmm interesting , must have changed something from 2012 to 2013 as on older models it did disable the audio/sound system.
Btw you can also just pull the ASD module located in the trunk , this will also retain the audio system/sound and only remove ASD all together
There was a slight revision to the Active Sound module but the change was minor and not something that seems to have changed the behavior you've described. The M5 Technician Training Manual doesn't mention complete disablement of the audio system.