I have a '79 300D replacing the dash. Don't know what year this dash comes from...

See attached pic for some kind of sensor that vents thru the dashboard. On this particular dash it is located in the middle. In my original dash it is located to the extreme right by the passenger side.

The question: do I need to hook this up?

A) I didn't have any wires on my old dash or they were long ripped out. See the arrow in the pic for the wires on the new dash.

B) Since it's located so far from the original I'll have to run a hose over to it if it's important.


At this point I'm set to install my dash without worrying about this piece. Doesn't look like it worked on my car before anyway.

Ideas?

Thanks,
Bill