Hi,
I'm working around my sons 1977 280E and I've noticed a few things, but not sure if they are problems.
I've posted the pics, to make it easier.

In pic1 - There is an open hose (circled in yellow) which is ultimately connected to the EGR by way of metal pipe (circled in black). Should this be connected to something?

In pic2 - There is a sensor of sorts (circled in yellow), should this be piped to something, as there are two connections on it?

Many thanks

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