Archives are no help here, as there is no definitive answer.

CD manual says to add oil to the vacuum opening. Is this the small or large opening to manifold hose?

Can oil be added into the service valve? (after removing valve core)

Also, the 124 manifold hose has what looks like a muffler on it. Is this hose flushable? I've read that any hose with a muffler should not be flushed.

Thanks for any advice given!

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-Paul-
'01 E430, Sport 72,000 mi
'98 C280, 126,500 mi