If they are "shaking" when you come to a stop it ususally means the rotors are warped. Cheap Pads.......No amount of turning will fix them. Seems to be normal with MBZ after 75000 mi or so. Probably 2 or 3 sets of pads.

I just replace my rotors and pads and sensors (all OEM) for $119 total. Not a bad job really. And no dust yet.

I've never heard of anyone actually recommend "turning" them.

For a few dollars more you have the piece of mind with new ones.

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1986 SDL
My Other Car is a Porsche. When it stops leaking, I'm out of oil.