w123 HVAC recirculation modification - PeachParts Mercedes-Benz Forum

sleepstar · #1 03-25-2015, 11:17 PM

Quote:

Originally Posted by fahrvergnugen

The only problem I can see is that there doesn't appear to be a cabin vent...

All modern cars have flaps that allow positive pressure from inside the cabin to escape, even my Mk1 Golf had seals in the door panel; W123s may have this too, but if they do I am unaware of where they are. Without them, I could see a possibility of a problem.

aren't the vents on a W123 under the aluminum trim piece behind and over the passenger doors?

DeliveryValve · #2 03-26-2015, 11:25 PM

Quote:

Originally Posted by sleepstar

no matter what you do, i think it should still be pulling in some air from outside. theres a vent that feeds into the ductwork above the blower motor but below the normal fresh air flap. it leads to a tube that attaches to an opening in the body forward of the passenger door.

It's a relatively small tube that brings in a very small amount of outside air from the fender area.

Quote:

Originally Posted by sleepstar

Quote:

Originally Posted by fahrvergnugen

The only problem I can see is that there doesn't appear to be a cabin vent...

All modern cars have flaps that allow positive pressure from inside the cabin to escape, even my Mk1 Golf had seals in the door panel; W123s may have this too, but if they do I am unaware of where they are. Without them, I could see a possibility of a problem.

aren't the vents on a W123 under the aluminum trim piece behind and over the passenger doors?

Here are pics of the vents exposed courtesy of charmulu.

.