I have changed rotors several times on my w202s and w124 and have always used Balo. They have always worked well with no issues and seemed to be high quality.

Noticed the parts sellers are now offering Bosch QuietCast rotors for a substantial savings (fronts $63 vs $38). If the pictures are an accurate indication, the Bosch don't have the machined look like with Balos or Zimmermans.

Any feedback on these Bosch rotors? Nice to see that most rotors available now are coated.