Mercedes does say replacement of the caliper bolts is a must if they are removed. The bolts are what they call as being "Microencapsulated", in other words they are coated with a special threadlock compound at the factory. They can be purchased at a MB dealer for a reasonable cost.

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ASE Master Technician, Lead Technician for Deutsch American Inc. Over 6 years of Import experience-specializing in German Automobiles.