Slow day, snowing outside...

Every once in a while as I'm under my 1980s 300Ds and staring up at the transmission, I've wondered:
What would be Mercedes-Benz's explanation for why they never produced (that I am aware of) an official Factory Service Manual covering the innards of the 722.3 / 722.4 transmission?

I'm struggling to remember: Was it that the transmission was made by somebody else?

If anyone happens to have some insight on this, I'd appreciate learning the real story. Thanks-

ATSG, automatic transmission service group published a manual on them.

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Jim

Oh yes, I do now remember coming across something probably in the 1990s about ATSG doing a manual. Thanks for that.

Look online for some free access. There is a Mitchell's manual and the ASTG Manual pdfs. The ASTG is presently on a CD (or DVD?) eBay may have some of the printed manuals; however, it only has line drawings.

TRANStech (CORTECO) also had a pdf on the internet at one time.

Member Stretch has said that only the German Language versions of the Mercedes Factory Service Manuals has the transmission rebuild information. But, if interested contact him for details on that.

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84 300D, 82 Volvo 244Gl Diesel

Hadn't heard of this.

Again, new info. to me.

Oh, I find this fascinating! They surely had their reasons. A bit peculiar it seems to me. Unfortunately, I currently don't read German but that's okay.

Anyway, my sincere thanks for your sharing this helpful information!

The 722.3 and 722.4 service manuals were only in german and were never translated. I had them a while back - but hurricane harvey destroyed the laptop and the printed copies too.

They were extremely detailed though, even went down to each small difference of design and parts between years, engines, ATF type etc etc.

The ATSG manuals are more generic in nature.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)

Now that's a darn shame. I grieve your loss.
Though it is unlikely that I will ever know why, I do wonder: Why did M-B choose not to translate these important technical manuals despite translating so many others? Peculiar...LOL.

Oh, what great fun! Typical M-B...going at it with beautiful precision.

Good to know.

Thank you!

I happen to have the original German version for the w126 on my computer.

It is as elaborate as Zulfiqar describes and more: It also has a separate entry for the manual transmissions, clutch and pedal assembly of those years.

Another advantage of the German (original) vs English version of the manual other than having the transmissions is the resolution of the photographs. Those are much clearer than the rather blurry ones in the English version.

Will be happy to make it available if you can suggest a painless (one or two mouse-click) way to do so.


Or access BitTorrent and search "Werkstatt-Information Typ 123" (instead of typ 126 which is what I have) so you'll get the entire manual for your car.

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'83 SD, 2x '85 SD
You are entitled to your own opinions, you are not entitled to your own facts.

Good suggestion I hadn't thought of.
So far, found the ATSG. The M-B transmission doc. I found (228 pages) appears to be in Russian by the look of it. I'll keep plugging away and see what turns up.

Thanks for the help.

Oh yes, the pictures were very sharp - but the crazy level of information even for measuring the spring tension of small springs in the valve body was typically german. Extremely overshot in detail.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)

Hah! SO funny. And so typical of the M-B engineers!
I laugh, admire, and pity them!

Of course they are in German; I've been considering taking a language class to learn how to speak, read and write the German language.

Siemens AG makes some of the world's most advanced medical imaging systems. If you ever get the chance to have a technician remove the front cover from a Siemens dual head cat scanner, it will take your breath away. The machine has the ability to take X-ray "slices" of the body.

The dual X-ray heads rotate around the gantry and can slice the body into just over 1600 degrees of a circle (I used to know the exact number but it has been awhile since I've seen one torn down).

Another example of superior german engineering is the heidelberg printing press. It has some type of specially engineered oil bath that allows it to operate longer with little maintenance required. Apparently, the japanese aren't even close......

https://www.dropbox.com/s/nezc7psyxjkw19d/248376570-Mercedes-240d-Trans-Manual-722-3-722-4.pdf?dl=0

there you go

Yes, thank you for the link. Good stuff from ATSG.

There is a factory "Description of Operation Automatic Transmission" book printed in English in 1985. I bought one online from a literature dealer for big money and when it arrived it was a photocopy not the original listed in the ad. Got my money back.
Book was not a repair guide just explained in detail how it worked and had color illustrations.

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