I use the PermaTex Ultra Disc Brake Caliber Lube which I think is the same as the MB Brake Grease.

I use only "yellow-box" Textar pads, and I have kept the stainless-steel shim that goes between pad and pistions installed with a thin layer of the Ultra lube on both sides.

No squeals and wife doesn't complain.

:-) neil
1988 360TE AMG
1993 500E