Light brakes and noise stops?
Is it a brake squeal perhaps?
Have you had your discs adjusted? or brakes adjusted?
perhaps you need some stop squeak?
It could still be something I mentioned if a busing is bad, maybe the brake will stabilize te vibration more than when its not applied.
I'm not a mech, but it wouldn't hurt to check.
After about 10 years, give or take a few, the rubber in the suspension and elsewhere can get spongy, and aloow more movement.
I think my noise is directly related to the new lowering springs. Probably needs to be repacked or replaced but we shall find out.
'92 300CE - Sold
2004 C240 - C7 Wheels
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.