I have a problem with the foot vents on the 91 SDL, I have good vacuum going into the manifold, the circuit is testing good, the vacuum pod is working when I use a manual vacuum pump. When I turn off the ventilation system it have vacuum coming out of #3, when I turn the system on the vacuum falls and the vent closes, am I right in assuming that the manifold is bad or am I missing something?

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OBJECTS IN MIRROR ARE CLOSER THAN THEY APPEAR, ONLY IN A BENZ

89 560SEC
90 350SDL (Rudolph)
91 350SDL (300SDL drivetrain)
87 BMW 635CSi (Swanhild)
89 BMW M6 (euro)
99 Suzuki Hayabusa (Only the fastest thing ever)

I had a similar issue in my 85 with the defroster pod. I switchover valve from the JY cured it.

While I was there I pulled a 7 way manifold from a 560SEL. It is nice as it's all one unit with one electrical connection and one vacuum supply line rather than mine which has 6 seperate independent valves.

I pulled it before I knew what I had on mine.

Although I am uncertain if it works correctly, you can have it for shipping if you want it.

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----Adam

1985 300SD 322,000

Just realized that shipping to Canada might not be worth it, your call.

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----Adam

1985 300SD 322,000