Casey, The 7-port manifold is part number 124-800-07-78, about $100 (ouch) from Rusty. Those of you wondering what we're talking about, check out this photo:
http://img.eautopartscatalog.com/live/O404573890OES.JPG The EPC seems to indicate that the same item is use on all W124's regardless of model year or powertrain. As to the probability of it being bad, or how to test it, I really don't know. I would think that it could be bench tested with a 12V supply and a MityVac but I've never had a need to (yet). Maybe Aaron could locat a used one from Pick-n-Pull for you? As a temp fix, your theory about plumbing in a manual trigger should work fine. Or just connect a "T" to the main vacuum feed line for the winter. Even on max defrost, I think the footwell flaps remain open (but I'd have to check the ACC manual to verify that.) :-) -dm > ------------------------------ > Date: Sun, 27 Nov 2005 07:44:46 -0800 > From: Zeitgeist <[EMAIL PROTECTED]> > Subject: Re: [MBZ] ACC madness > > > On 11/26/05, Jim Cathey <[EMAIL PROTECTED]> wrote: > > You _are_ sure that the pod works, and doesn't have a microscopic leak? > > The footwell pod gets a vacuum restrictor in its line, so it is the > > most sensitive to the beginnings of a diaphragm tear. > > Last year I just split the supply line for vacuum to the 7 port > manifold and sent it directly to the footwell pod (always on) -- the > pod held vacuum just fine. > > > I can't remember if you've proven the system out already. (No leaks, > > voltage as req'd > > to the vacuum valve.) > > No, I've been lazy so far and haven't done a stellar job of > diagnostics yet. The cryptic references, unhelpful diagrams and > wooden prose of the CD's repair procedures make my eyes glaze over... > > Casey > Olympia, WA
