Mine got better after a week, then I left town. still feel good now.
My car is a 1992 300CE though. Btu I got the ATE pads and rotors too.
Brake Dust after a week was not that bad either.
'92 300CE - Sold
2004 C240 - C7 Wheels
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.