Hey, thanks for the info in note 181. I didn't catch that one. I got fixated on trying to find wether or not the new part# was posted and not seeing it. Thanks for the direction. Love this post !!!

With regards to the filtered vaccum line going through the battery compartment and into the fire wall??? It's definate sounds as if it's going through the ventilation system in some way inside the car. I can hear it hissing as I push air through it (did sound restricted at one point). Where this line ends I have no idea. A little confused why it's tapped into the vaccum draw if it's just ventilating to the atmosphere as that would bleed out the vaccum from everything else like a leak. I'm obviously not understanding something or suffering from the wrong vaccum diagram. Any more detail you can provide would be greatly appreciated.

On my car as I hook up the previous owners disconnected vaccume lines the EGR and Mixer/Cutoff Valve immediately pull full draw and choke off the engine. Connecting the vaccum line going through the firewall as shown in the Vaccum Diagrams bleeds out the system. So either way nothing works right. My guess would be some of the diaphrams or selinoids are bad. My reason for the Manual modifications here.

Electrical: After removing all the vacuum components there's three or four connections to the vaccum selinoids on the left side of the engine bay. I presume disconnecting them will not through any codes or is there something else I should do with them? (1992 Mercedes 0M602 300TD)

Again, thanks for all of your help. Just looking for a little clarity on these items. This sounds like a great mod to do. Especially with all the exterior engine gadgest growing old at 285k miles.