I don't care what it sounds like from outside. It's what's inside that counts
I keep the volume up higher than that to the point the side view mirror shakes. Overall ML has been fine for me though sometimes I miss the subs I had installed in the 330 to kick up the bass. But I won't be going down that road again. ML was a $1,600 option on my 450h. The only thing I would do is maybe install sound deadening material like MEP did. Still haven't gotten around to it.