I have BMW 730i ... I wander if it has the automatic volume adjustment during driving, normaly luxary cars has this facilety, when the speed increased the volume increases ..

am I right .. ?????

I've never heard this before and I haven't ever noticed it in my friends 740i. not quite sure.

Yes, you are CORRECT!

BMW E38's have auto volume adjustment.

You will notice, as your speed increases, your audio volume will increase. Only very slightly though.

-DROOOZ