Vacuum Diagram Req- 280SE W126

1979-1991 280SE, 300SE, 300SEL, 380SE, 380SEL, 380SEC, 420SE, 420SEL, 420SEC, 500SE, 500SEL, 500SEC, 560SEL, 560SEC
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Astro-Benz777
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Model you own: w126
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Vacuum Diagram Req- 280SE W126

Post by Astro-Benz777 » Sat 16 Jun, 2018 2:12 am

I'm not sure if this is a stupid question or not but I've had a look about and can't seem to find a straightforward diagram/explanation of the (engine) vacuum lines for a 280SE W126.
From what I do understand, mine are almost ALL screwed up.... it went to a mechanic post accident and they (therefore it) has never been the same since.
Any help gratefully recieved.
W126's truly were the last real Benz in my opinion! :occasion5:
FORMER FAMILY:
1989 300SE (W126) Midnight Blue, Blue/Grey Interior (Gearhardt)
1982 380SE (W126) Thistle Green, Tan Interior (Sherman)
CURRENT DAILY DRIVE & BELOVED FAMILY MEMBER
1984 280SE (W126) Thistle Green, Tan Interior (Hilda)

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John Green
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Re: Vacuum Diagram Req- 280SE W126

Post by John Green » Sat 16 Jun, 2018 10:12 pm

80% of the vacuum lines are to do with the emissions systems. At a guess like most early W126's your smog pump is either disconnected or even missing so I would look at simplifying the system. All you need is vacuum advance and the idle up system when the A/C compressor cuts in.
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carl888
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Re: Vacuum Diagram Req- 280SE W126

Post by carl888 » Sun 17 Jun, 2018 4:25 pm

Is your car Australian delivered? The vacuum diagrams are vastly different if Australian or Row. I can help you with both.

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Astro-Benz777
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Re: Vacuum Diagram Req- 280SE W126

Post by Astro-Benz777 » Tue 26 Jun, 2018 4:49 am

It certainly is an original Australian Delivery vehicle so any help would be great.
John, you are correct, the "Auxiliary Air Pump" (smog pump) for the EGR etc certainly has been disconnected but my idle issues can all be traced back to the buggerizing around that was done with the vacuum lines.
My EGR valve has been bypassed and all on that side of the block looks right however it's the solenoids behind the left headlight (as you say "idle up" for the aircon &.....?) as well as the connections to the purge valve and the various points on the intake manifold etc that have me concerned.
Thanks in advance for any help.
W126's truly were the last real Benz in my opinion! :occasion5:
FORMER FAMILY:
1989 300SE (W126) Midnight Blue, Blue/Grey Interior (Gearhardt)
1982 380SE (W126) Thistle Green, Tan Interior (Sherman)
CURRENT DAILY DRIVE & BELOVED FAMILY MEMBER
1984 280SE (W126) Thistle Green, Tan Interior (Hilda)

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carl888
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Location: Melbourne

Re: Vacuum Diagram Req- 280SE W126

Post by carl888 » Tue 26 Jun, 2018 7:51 pm

There's a bit to get through, but I've done a fair bit of vacuum line work with two Australian W126s with M110 and M116 engines with regards to the vacuum lines, you can start reading about half way down here:

viewtopic.php?f=10&t=14980

It does continue on successive pages so you'll need to fast forward past a bit of rubbish.

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Astro-Benz777
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Model you own: w126
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Re: Vacuum Diagram Req- 280SE W126

Post by Astro-Benz777 » Tue 26 Jun, 2018 11:56 pm

:notworthy:
Thanks so much, you're a gentleman and a scholar!
W126's truly were the last real Benz in my opinion! :occasion5:
FORMER FAMILY:
1989 300SE (W126) Midnight Blue, Blue/Grey Interior (Gearhardt)
1982 380SE (W126) Thistle Green, Tan Interior (Sherman)
CURRENT DAILY DRIVE & BELOVED FAMILY MEMBER
1984 280SE (W126) Thistle Green, Tan Interior (Hilda)

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Astro-Benz777
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Posts: 28
Joined: Tue 03 May, 2016 7:40 am
Model you own: w126
Region: Victoria
Location: Melbourne

Re: Vacuum Diagram Req- 280SE W126

Post by Astro-Benz777 » Wed 27 Jun, 2018 12:27 am

Carl,
I am in total awe of the magnificent attention to detail and quality of work you carried out on the vehicle (s) in that thread..... Seriously, I'm totally blown away.
You took what many people would have seen as a wreck job and turned it into a work of art that not only meets the original but in all likelihood, exceeds it.
If I am able to end up with a fraction of the skill and dedication you have, I'll count myself lucky.
I have a real love for W126's, especially 1st Generation's, for me they're the perfect mix of technology and servicibility (if that's a word) and despite it being the "base model" I'm particularly drawn to the 280's and their wonderfully quirky M110's that just never give up. So after a couple of false starts with other Benz', I'm putting all of my efforts into learning as much as I can about the 280/W126's & applying it as required on my Thistle Green 280SE Hilda.
You've inspired me to not settle for just "ok", now I want to make Hilda the vision of 280SE W126 perfection!
It may take me a decade or so but it'll be a fantastic journey getting her there!
Thanks for the information and the inspiration! :notworthy:
W126's truly were the last real Benz in my opinion! :occasion5:
FORMER FAMILY:
1989 300SE (W126) Midnight Blue, Blue/Grey Interior (Gearhardt)
1982 380SE (W126) Thistle Green, Tan Interior (Sherman)
CURRENT DAILY DRIVE & BELOVED FAMILY MEMBER
1984 280SE (W126) Thistle Green, Tan Interior (Hilda)

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