What is this? and how do I change it? it seems to be a vacuum line ....

could this be sucking transmission oil into the manifold? the line coming out of it goes through the body and I don't see where/ if it goes into the engine..the elbow is completely torn, and there is some good oil coming out of it....





In the second picture you can see it leak, it is not the red shift modulator that is leaking..that seems to be fine

Thanks guys

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1993 300E, 2.8 M104 .....