Update on finding V acuum Leak

O.k. Just wanted to thank everyone that have posted all the helpful information on this site. Now for the update, In tracking down the Vacuum leak that was preventing the car from shutting down and the doors from not locking. We have track down the source, It is one of those Pink Diagram under the dash, behind the glove box. IT has a little arm that open and closes a door. After, Plugging the Green line leading into the car thur the firewall, we tested the doors and shutting off the car, as sure enough, everything was working fine. After, testing we were able to track it down to this pink thingy. Now the big Question! after reading some information via this site, I understand that we may have to remove the dash to replace this pink thing. I also understand there was a posting that went into detail on the removal of the dash. Any clue where I can find this posting? Any leads in this direction would be greatly appricated, as it we be next weekend project. Also, any Idea on to remove it vacuum thing. It seems to want to twist, I have undone the rod, but it dosen't want to untwist. thank again, this place has been so helpful in our hands on learning about the 240D.

[leathermang]

Be sure you read the entire post when you find it...LOL.... the part where he says he would not do it again might be interesting if you are planning on doing it in one weekend.... LOL...

Here is part of his report....

dashboard replacement progress

[tcane]

The vacuum actuator that can be accessed behind the glove box should control the flap letting fresh air into the system when the flap is open or recirculating interior air when closed. You should be able to remove this actuator by only removing the glove box. The actuator that requires removing the dash is the one that controls the flap for the center vents. At least, that is what the tech info I have shows and others with the later W123's say - another member with your specific model may have other info to help. My '77 W123 300D is set up this way and I can remove the fresh air/recirculating actuator by removing only the glove box. However, M-B changed the position of the AC components in different models and years - so look and see if you can access the actuator enough to take it out.

Removing the actuator requires unplugging the vacuum line, disconnecting the rod connection at the flap, and then the small metal clips that fit onto plastic pins located on the main body of the actuator. There are three metal clips and three plastic pins - there are also small rubber washers on the pins to cushion the connection. The metal clips grip the plastic pins and I remove them by using a small flat blade screw driver as a pry bar to pry the clip until there is some space and then I use needle nose pliers to grip the metal clip to finish removing it.

Good Luck!
Tom