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  #1  
Old 06-12-2005, 02:34 PM
boneheaddoctor's Avatar
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W116 climate control problem

Here is what I experience..........everything works fine.....EXCEPT the air only comes out of the defrost vents and heat vents...which are default...

A/C works and is controlible, Heat is the same...only problem is no cortrol of dash vents. Any Ideas...I have been going through the manual to no avail.

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1983 300D W123
1975 Ironhead Sportster chopper
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Old 06-12-2005, 03:22 PM
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Your car has the evil servo doesn't it? It's got about 356,452,670 vacuum lines coming from it to the inside. One has a leak. Good luck!
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1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
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1984 500SEC
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1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350
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  #3  
Old 06-12-2005, 03:35 PM
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Quote:
Originally Posted by Johnhef
Your car has the evil servo doesn't it? It's got about 356,452,670 vacuum lines coming from it to the inside. One has a leak. Good luck!

Oh what fun.. ..has worked perfectly since I put the Billet Aluminum rebuilt servo last year...in the last month vent control stopped..well since the get together anyway.

Car gets cold , fan works so it could be worse. At least I won't be sweating to death till I figure it out.
__________________
Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
---------------------
Section 609 MVAC Certified
---------------------
"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche
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  #4  
Old 06-12-2005, 04:48 PM
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I've got a 84 123 being dropped off this week with no a/c and only blows on the defrost vents. I'm going to be pulling the dash and putting all new servo pods in it, possibly an evap as well. Sounds like you're going to be doing the same to fix yours.
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1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350
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  #5  
Old 06-12-2005, 05:32 PM
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Well I got it working.....not sure what did it though, thats the funny part.

Swapped Dash controls with my spare...still didn't do any different....about an hour of fumeing and brooding I dug around to find a dash bulb I managed to break put it back together then noticed the dash vent was closed.... .... then it started...I think somewhere along the line the problem was corrected because it was coming hard and heavy out of dash and floor...so how much was brain fart and how much was legit problem I can't tell. I don't feel like swapping the original back to find out.

John...in my case A/C was always working fine.compressor was coming on and blowing cold air....it was just how the dash vent controls were working that was flakey............got stuff going where it needed to go.
__________________
Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
---------------------
Section 609 MVAC Certified
---------------------
"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche
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  #6  
Old 06-12-2005, 05:43 PM
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Join Date: Feb 2005
Location: Frederick, Md
Posts: 4,540
Youre absolutly right. This 123's got two seperate problems. I was trying to explain to him about it but he just said fix it
__________________


1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350
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  #7  
Old 06-12-2005, 07:39 PM
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Location: Central, CA
Posts: 97
bone,
Before starting ,Turn off a/c switch, let vacuum build up (about 1 min.), turn on a/c switch, select function (button), wait about ten seconds.
Turn off a/c switch, then everything should work.
If you want a/c, turn on a/c switch.
These things are slow to respond, the little sinc motor has to sinc with the contoller.
At least this is what I have to do on my 80' 116.
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  #8  
Old 06-12-2005, 09:24 PM
boneheaddoctor's Avatar
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Well I do have a very minor vacume leak somewhere....as the door locks only hold vacume for about 4 hours, then I have to do a stretch armstrong to get it open before the car is started.........my W123 holds it for days.

In any case its functioning now....Its a R134 conversion (like that when I bought it) so it gets cool but not icey.....once I fix my W123 A/C I plan to refit this one with R12.

__________________
Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
---------------------
Section 609 MVAC Certified
---------------------
"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche
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