Mercedes Benz repair: Mercedes Benz Diesel Vacuum specifications, mercedes benz diesel, vacuum specifications

Question
We have a 1983 Mercedes 300CD turbo diesel and the vacuum pump anly developes 8inhg at idle. The car won't shut off and the brake booster dosn't perform properly.  What should it be developing?
Thank you Clark

Answer
19 - 29 inches mercury of vacuum.

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