While poking around under my dash (driver side) I noticed at least two vacuum lines that come through the firewall and just end in space (not connected to anything) about six inches inside car. One is slightly larger than the other and has a clear filter on it inside the engine compartment on other side of firewall.

Is this normal? What are they for? I thought maybe electric seat option, which I don't have. But why aren't they stopped up?

This vacuum stuff is very worrisome. I am having no problems that I know of but I often read that others do.

Nic
'85 300CD @ 142k miles