Lifetime Premium Member
Date registered: Mar 2015
Vehicle: 2007 CL600, 2003 SL55AMG, 1987 560SEL ECE, 1985 280SL
Location: Oslo, Norway
Mentioned: 8 Post(s)
Quoted: 409 Post(s)
Another cracked vacuum distribution block
Having a classic vacuum fuel pump issue (it cycles on every 15-17 seconds), I pulled the vacuum distribution block aka vacuum manifold located behind the false firewall on the RHS. Sure enough, a small crack next to the metal ball socket.
Reading several posts on the subject, this must be one of the most usual wear items on these cars, at least when they approach 25+ years!
So if you experience a vacuum leak, either the pump cycles or some vents are not functioning on the climate system, check this valve first! Very easy R/R DIY job! Part number 129-800-14-78. Cheapest find on Pelican parts for $25,50.
Stay flexible - keep smiling
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