Volume keeps adjusting (I know this is a feature just want to turn it off)

The volume on the audio system keeps adjusting automatically - i.e. louder when I am driving faster and softer when the vehicle slows down. How do I turn this feature off?

thanks in advance!

I think the only thing you can do is set the "Speed volume" level to the lowest setting. If you haven't changed it, it's probably at the default 1/2 way mark.

Volume
> "Speed volume": adjustment of volume depending on driving speed
> "PDC"*: volume of the PDC signal tone rel- ative to the entertainment sound output
> "Gong": volume of the signal tone, e.g. for the "Fasten safety belts" reminder, relative to the entertainment sound output

As others have mentioned, it's the SVol parameter. If you don't have iDrive, hit the Audio menu button; it should show up, and use the right knob to get to it, press it again and adjust.

Thanks everyone. I will try this and post back.