I don't know why so many people give the ACCII such a bad name, when i got my 1978 everyone had me believing it would cost me 3k to get it going and would involve disassemble of the dash. I spent 150$ to get my system fully working, it works perfect, keeps the cabin a perfect temp and all the flaps work. It has been going fine for over 3 years, besides the blower motor brushes wearing down...this summer I will get the ac charge and it will be prefect, I have no reason to ever replace it or add the unwired kit. I also find it much easier to work on then that of the ACCIII system, and my manual system in my euro had more issues then the 78...It is also an amazing design achievement in my eyes....to figure out the layout of the vacuum system to operate the system..

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IT LIVES!!!!!!!!! found my problem today to the little colored wheel, took it apart(watch out for the ball bearing) cleaned it up and put it back together, topped off the charge and working good for now. I may have a vacuum leak but hard to hear over the motor plan on hooking up a vacuum pump to the system and see what it sounds like then. nice to have cold air for summer

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"NEW" 1984 300D TD needs some love

That's good to hear. But I have to say it appears that your experience is rather the exception that proves the rule.

- Peter.

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2021 Chevrolet Spark
Formerly...
2000 GMC Sonoma
1981 240D 4spd stick. 347000 miles. Deceased Feb 14 2021
2002 Kia Rio. Worst crap on four wheels
1981 240D 4spd stick. 389000 miles.
1984 123 200
1979 116 280S
1972 Cadillac Sedan DeVille
1971 108 280S

It was used in the early '70s big Chyslers like Imperial & Newport. After Chrysler moved on, they peddled it to Mercedes. Interesting that Mercedes combined the worst of Chrysler (the Evil Servo) and the worst of GM (the AC-Delco R4) to heat & cool upmarket W123s.

Happy Motoring, Mark

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DrDKW

Let's be fair.

This is a system designed in the early 1970s for use on a large, gas-burning V8 automobile. Moreover, I am sure no one at Chrysler ever envisaged it being grafted onto a chassis that would be on the roads (as a daily driver, anyway) in AD 2014. Nor one with a vibrating diesel engine next to its most fragile component, the underhood servo. Mercedes gets the slaphead trophy for that latter decision. (Probably due to US dealers squealing to head office for auto climate controls.)

I find it the same as when people gripe about D-Jetronic fuel injection, a contemporary piece of Bosch technology (the first electronic fuel injection system). Okay today it seems like scraping flint to get fire. But in the day it was damn near revolutionary.

Bear in mind that dealers had an automatic portable tester for the system that came in a briefcase so it could be used in the car while driving. I talked to an air force guy who had a 350slc over in Germany and whenever he had an issue the dealer guys would hop in with the tester and they went for a nice little drive. Boom, problem identified and solved.

Much of the traditional hatred for the system is because of the servo, which has always cost an arm and two legs. That IS inexcusable (if it's any consolation, they are actually cheaper now, than when I got into Mercedes in the mid-1990s).

That and the fact that no one has ever written a comprehensive, plain language, step-by-step troubleshooting guide. The factory manual isn't bad in this area, as the Mercedes manuals go, but it does turn some people off. A number of people have written DIY stuff touching on one area or another, but no one has done plain language, step by step, end to end.

I am about to start a full troubleshoot of the system in my 1980 wagon, having failed at the firehose method (plugging in new bits and praying to pagan gods for help).

If this costs me what remains of my sanity, please remember me as one who tried....

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Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

“Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22

Is D-Jetronic that nightmare 'experimental' fuel-injection system that afflicted my Mom's 1970 VW Squareback? When it worked it was flawless. When it was bad it was horrible. Even the VW dealer had difficulty fixing it.

Happy Motoring, Mark

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DrDKW

This is the best article out there describing the evil servo

http://www.imperialclub.com/Repair/Lit/Master/281/cover.htm

As was said above, when this came out....it was revolutionary....just like cassette decks and am radio....times have changed...I would also agree they never ever thought this car would last this long....they are probably smiling with joy, knowing that in 2014 the accII is still going strong in some cars!

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The best system is the manual type one used in the 240D`s. very simple, and works every time.

Here is a maintenance manual for the Evil servo type two system


Chrysler Auto-Temp II Service Book

1971 Imperial & Chrysler Auto-Temp II Service Book (Session 281) from Master Technician Service Conference


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

Hey Charlie, I am aware of that Chrysler book... but it isn't a service manual, it was the equivalent of the "theory and operation" part of a Mercedes service doc.

It is great to introduce you to how the system works but it doesn't have any step-by-step troubleshooting. For some reason, that Chrysler manual didn't make it onto the Net.

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Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

“Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22