There is a tantalizing thread in the DIY section about how to do this, but when you click the link it goes nowhere. I'm still interested, but have no w126 experience. Can anyone tell me (or post a picture) of the electric vacuum pump of a w126. The next time I'm at the salvage yard I'd like to find one.

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1984 300D

open 126 trunk. lift spare tire rug cover, on right side. black triangular thing with wire and hose exit is it.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

That seems like a long way for direct current to travel. Would the pump work better if mounted to the engine bay, closer to the battery?

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1984 300D

Also, what year were these pumps installed? The Wikipedia page says the W126 line started in 1979, but surely they didn't have the electric pumps then? Does anyone know a year, or range of years to look for?

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1984 300D

I'm pretty sure but not positive that 1st generation w126 (through MY85) were engine vacuum and the electric auxiliary vac pump was introduced in the 2nd generation (86-91). I don't know though. All it will take is one guy to say "My 85 300SD has electric vacuum" to prove me wrong. It's my best guess though.

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~Michael S.~
Past cars:

1986 300SDL
1987 300SDL
1982 240D
1982 300SD


Current:

1987 300SDL

I'd say your best guess gives me a great place to start at the salvage yard anyway. It would seem the later model car I can find would be better, since less wear and tear on the electric vacuum pump.

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1984 300D

The 1984 SD had it in the Trunk ,for the Lock system.

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'84 300SD sold
124.128

my 85 300SD has one!

there, i said it

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----Adam

1985 300SD 322,000

Our 1981 300SD has one too.

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.

How great that the 81 w126's had one. Meanwhile, all of us w123 owners are wandering in the desert of non-working door locks. In the words of George from Seinfeld "Here I am rubbing two sticks together and you've got a Zippo".

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1984 300D

It wouldn't seem that your locks dont work because of your vacuum pump The only folks "wandering in the desert of non-working door locks" are those that dont get a "mity vac" and track down why they dont work. After 30+ years some of the connectors and pods need replacing then you have a great system, lock the driver door and everythings locked, I love it.

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"

Stevo - I've got a mity-vac, and use it often, which is where the problem comes in: the W123 vac system runs off a single vacuum pump. When any little part of the system goes wrong, the whole thing fails. If the various component of that system were broken apart, with each running off it's own vacuum pump, diagnosing and repairing problems wouldn't take as long, and when one part of the system fails, the others parts keep working. This is why I want to install the electric vacuum pump the W126's have. It's just a better system.

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1984 300D

Gotta side with Stevo on this one. The reason George had sticks is because he wasn't real bright. A vacuum pump is a vacuum pump. If all you do is change the pump withoutout fixing the vacuum leaks you will have the same results. Now if as you indicate that you want everything on a seperate sytem that is going to be a ton of work. If you can pull that off you could much easier just fix what you have. But thats only MHO so for others that may want to follow you out of the desert please let them know how it goes. Thanks

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83 300D 227,xxx miles, sold
86 300 SDL 130,000 miles, sold

Well since you want to go the electric vac pump route, it is in the trunk in a moisture proof area in it`s own little compartment. I don`t know if under the hood, and not protected from moisture, the longivity of it. something to consider.

The W124 has the pimp and I think the 190E/D also, but under the rear seat. might very well be the same pump.

Having it in the trunk and having direct current running to it, seems to work ok.

Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

IMO... This seems like a waste of time and resources to me. Once you understand the basics of the 123 system, it is pretty easy to troubleshoot.

If you need any help troubleshooting... Drop me a line in the PM folder.

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AJ

1985 300D (SOLD)