[W126 Coupe] [MBCOUPES] [w126 coupe] AC control unit and its functions

[Yousef nazzal]

Hey all

i found this forum .. this guy has done a great job with his SEC project ..
but ive noticed some thing with his AC control unit... its just like the
W124 control unit.. i was wondering if i could replace mine with that .. and
would it fit from an SEL?

http://forums.finalgear.com/post-your-car/my-1989-mercedes-560-sec-46244/page-2/

Thanks
Yousef

On Thu, Aug 25, 2011 at 5:24 PM, Gerry Van Zandt <gerry at vanzandt.us> wrote:


>

> You really can't replace all of the vacuum pods without removing the

> dashboard and center column/console. You can get to some of the pods, but

> all of them really need to be replaced at the same time so as to avoid

> having to re-do this job in the near future.  I recently did this job on my

> W124 wagon and it's not as horrible as it's made out to be.  I say it takes

> about 10 hours total to do the job, and that is taking one's time.  Dividing

> it up over a weekend (or a 3-day weekend) seems to be a good way to go for

> something like this.

>

> You need to test the system with a Mityvac (handheld vacuum tester). There

> is a single point where all vacuum lines come into (called the vacuum

> distributor or vacuum tree) and this is the point where you can remove the

> lines and test the pods individually with the Mityvac. In reality though, it

> doesn't matter because if you find one single bad pod, there are others that

> are either already bad or shortly will be.

>

> The best place to order the pods from is either AutohausAZ.com or

> parts.com.  Sometimes a couple of the pods won't ba available on the

> aftermarket, so they have to be ordered as factory parts and this is where

> parts.com is handy.  ONLY order Behr or Hella pods as these are the OEMs

> for the MB pods too.

>

> If you go to the climate control manual on the 126 CD (available at

> www.startekinfo.com, click on the "MB Workshop Resources" link at left

> side, then select the 126 Workshop Manual link) you will find extensive

> instructions on how to test the system both electrically and

> mechanically/vaccum-wise.

>

> The sliding levers under the center vents control the vents themselves.

>  The left and right sliders control the left and right vents (open or closed

> or somewhere in between) and the center lever controls the pair.  All three

> levers should move fairly smoothly from right to left, so removing the

> vent/dash will give you an opportunity to determine what the situation is.

>

> The dash can be removed with hand tools. The most exotic thing you need to

> have to successfully fix do the pods is the Mityvac.  These are available

> from tool stores or via eBay.  I think I got my Mityvac for under $100.

>  Don't use it very often, but there's really no substtute for it when

> testing the vacuum system for the door locks and climate control systems, or

> underhood vacuum check valves.

>

> The vacuum / climate control system between the 124 and the 126 is close

> enough that you might find the following link, where I replaced all of my

> pods earlier this year, helpful:

>

>

> http://500eboard.com/forums/showthread.php?1370-HOW-TO-Replacing-the-HVAC-vacuum-pods

>

> I also believe there's a fellow named McLare on the Benzworld forum who

> documented this job some time back on the C126, as well as multiple other

> threads on how to replace the pods.  There's a detailed write-up on how to

> remove the 126 dashboard here:

> http://www.benzworld.org/forums/w126-s-se-sec-sel-sd/1592346-w126-dash-removal-gen-ii.html

>

> Good luck !

>

> Cheers,

> Gerry

>

>

>

> On Aug 25, 2011, at 7:56 AM, Yousef wrote:

>

> >

> > Hey all

> >

> > Currently working on my AC system have been able to fix my cooling

> problems but now looks like i have issue with distribution.. I have come by

> this vid on youtube .. I found it really helpful.. I think i might have a

> problem with my vaccum pods (pink ones) so i wanna replace those ( if i can

> access them without a dash removal) i was wondering if they are the same

> ones as w124s ?

> >

> > http://www.youtube.com/watch?v=rRP892ytqXg&feature=youtube_gdata_player

> >

> > Also what does each button exactly do ... Which flaps open\close?

> >

> > What do the 3 sliding things under the AC vents exactly do .. The middle

> one dosent go beyond half way (from right to left) i dont wanna force it and

> break smthing ..any ideas?

> >

> > Great thanks

> > Yousef

> > Sent from my iPhone

> >

> > _________________________

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> > mbcoupes at mbcoupes.org

> > http://web.me.com/dakota/Mercedes/MBCoupes.html

>

>

>

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-- 
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Yousef Nazzal
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