I have a 2014 IS350 with Mark Levinson. Does anyone else have the auto volume setting for sound? Not to be confused with ASL. What is this setting supposed to do? Sometimes when I turn it on, the volume gets louder but sometimes it gets quieter so I'm confused. Let me know if you guys got it too.

 

With auto volume enabled, the volume automatically increase the faster you go since the road noise is higher. The volume will auto increase let’s say when you go on the highway and decrease again when you are back on a local road.