New metallic formulated pads can do that until they're really broken in, and in some cases even afterwards.

I had a mechanic that used to very briefly take new pads to a belt sander to prevent that issue.

No idea if it works, never tried it.

__________________
-tp


1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS
1988 560SEL "Gunther"- 190K passes anything except a gas station
1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition