I'll throw this out - not because I necessarily believe it - just making it available for view.

Back in the earlier days of the internet - there was the Ritter-Easley MB list.

Stu Ritter was an MB tech - owned an independent dealership in Colorado - worked on MBs for 30 years. He started his career in a San Franscisco MB dealership.

He was adamantly against the use of rebuilt brake calipers - safety issue.

The new/dealer provided MB calipers were top flight in his view; anything else was liking skating on thin ice.

Believe what you want.

__________________
Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"