I was meticulous about cleaning all mating surfaces with cleaner and wire brush. The issue isn't mating, it is more like if you had really rough pads on really rough rotors - that kind of friction rub/roar.

What kind of pads did you install?

__________________
1994 C280, dark green metallic
105k miles

1991 190E 2.6, Black
191,500 miles
(sold to another forum member)

2003 Chevy Tahoe LT, Redfire Metallic
105k miles

1989 Mustang GT Cobra Convertible
43k miles

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

Mintex something or other I think. Whatever was cheaper at the time.

I used red box Mintex. Got an email from Meyle tech service that noted they have seen some issues with certain pads having issues working with their geomet coated rotors. Some have the problem right off, others after 1-2k miles.

I may change pads to see but don't want to waste another $40.

__________________
1994 C280, dark green metallic
105k miles

1991 190E 2.6, Black
191,500 miles
(sold to another forum member)

2003 Chevy Tahoe LT, Redfire Metallic
105k miles

1989 Mustang GT Cobra Convertible
43k miles