Second part of repairing and diagnosing the vacuum system of the Mercedes Benz m117 vacuum system. My apologies for the bad filming. Wil improve next time but the information is what counts.
To purchase my 1969 to 1991 Mercedes V8 valve cover service / leak fix kit click on this link: https://mercedessource.com/store/m116-and-m117-v8-valve-cover-service-oil-leak-fix-kit