722.6 ATF
You can get the indie/dealer to do the partial drain, change filter and clean up the pan.
Afterward, you can follow multiple sticky diy procedures to flush fluid using the cooler line. For me, the easiest one to get to is the flexible hose that attach directly to the radiator. It only take me about 45 minutes to do so. It may look different from car to car, so do your research.
Regards,

Respectfully, that's why I beg the differ.
1. MB doesn't make ATF, they put their approval on the products they tested. You claim all of them are of same viscosity, I sent a chart showing all approved fluids are not the same viscosity. Now, you say the difference is viscosity are neglegible?
2. You said MBUSA is screwed up with recommending lifetime fluid, but you also stated that the European MB Taxi industry has all kind of ATF problem (I presume they follow the 39k mile recommendation and use the proper spec fluid?) - so WHY does the European MB Taxi's have problem?
3. You said 236.14 is the best for 722.6 tranny, I send a link where owners have problem doing so - I believe that's proof. You basically called them a mixbag - you disregard anyone's sucess using other fluids, and only one person who see it your way is sensible?
Most likely I'll try to stay away from possible confrontation as this ATF topic is torturous.
The european taxi industry has typically suffered failure of the first to second one way clutch at about 700,000Km from too many high torque changes in that application.
People don't understand what they percieve as a problem. They don't understand desired clutch lock up & transmission adaption either automatically or with a star. I've explained what an over smooth change can mean - too much slip.
Last edited by Glyn M Ruck; Feb 6, 2012 at 06:36 PM.

I called McNally (reputable local indie) and 2 other MB dealerships, their transmission services include partial flush only. When asked for the full flsuh, they all said they didn't do it because it's harmful to the transmisison.
Can someone, locally in Toronto, suggest a indie who has the equipment and capable for the complete flush?
Find a decent Indy that is prepared to listen & take him a copy of the WIS instructions I posted. This is not difficult.
See C230 Sport Coup's thread. He has done a number of flushes on 722.6's himself. He also thought the 236.14 fluid made for crisper change & then it adapted & was fine & he has the old non-flashable TCU
https://mbworld.org/forums/c-class-w...c+transmission
Last edited by Glyn M Ruck; Feb 7, 2012 at 06:39 AM.
The man has made a successful career of advising manufacturers (and his company’s petroleum engineers) on proper lubricant blends. He knows of what he posts.
Disclosure: I’ve used 236.14-specification Shell 134 and Fuchs 4134 during my various DIY 722.6 & 722.9 fluid renewals.
Absolutely no trouble thus far. Beat on ‘em pretty regularly, too. Knock wood.
Of course you're free to use whichever ATF you’d like. :y
http://www.benzworld.org/forums/w210...d-722-6-a.html
Yes, there is a little status in owning a MB, but it not unsurpassed engineering any more. Windows regulator broke every other months, spring perch, SBC, suspension air pump, harmonic balancer, rust, engine mounts, tranny mount, pulleys, radiator, CPS etc... are on a long list of problems with newer Benz's. If you would attack anyone looking for different ways of doing thing, then please bring your car in anytime a light bulb is out - VISIT WORKSHOP. Oil change is $300 and ATF flush is $500. CPS is $400, HB is $500 etc... Yes, that's staus for you. I just want to help other members to save money and offer my opinion. Doing whichever way is up to the owner, but don't go where you have to do this, do that because someone said they know so. Or don't do that because you own a MB, why cheap out.
For your information, Shell 134 (is 236.14) is only $5.** a quart at Rider - which is actually cheaper than other ATF. But where I stand, I will not recommend using it in a 722.6 tranny. Read the linked thread above.
At the time when my car was built the 236.10 fluid was the current fluid. Times change, improvements are made. The 722.6 continued to live on, as I'm sure you know - in the high powered AMG cars - for a time. As a matter of fact, I think the 722.6 may still be used in some cars to this day. Do you really think that Benz disregarded this transmission altogether when approving the 236.14? I think not.
If you don't want to use 236.14 in yours.. hell, if you want to use off the shelf generic ATF in yours.. that's fine. But don't try to persuade others into that. Transmissions are expensive across the board but really very much so with a Benz. Sticking to Benz recommendations is the way to go.
Last edited by LILBENZ230; Feb 7, 2012 at 08:43 AM.

https://mbworld.org/forums/attachmen...0flush1-1-.pdf
https://mbworld.org/forums/attachmen...0flush2-1-.pdf

I came to find out that some dealerships do not want 2 techs working on the car so they only do the " drop the pan and put in 5 bottles" partial method.
Also, someone mentioned that when asked why they don't recommend a
complete flush and replacement of the ATF, he was told that this may cause problems in a high-mileage transmission since it loosens and moves debris around in the transmission, etc.


I came to find out that some dealerships do not want 2 techs working on the car so they only do the " drop the pan and put in 5 bottles" partial method.
By far the vast majority of 722.6 transmissions on this board are on the w203 forum due to numbers sold. Many of course are 4 cylinder models with M111 or M271 engines which don't stress the transmissions as much as the larger engines. splinter has a C32 which gets tracked from time to time & enthusiastically driven in general.
I do, however believe that due to the generally younger demographic driving the W203 that some of the cars are driven very hard.
The Best of Mercedes & AMG

Also, someone mentioned that when asked why they don't recommend a
complete flush and replacement of the ATF, he was told that this may cause problems in a high-mileage transmission since it loosens and moves debris around in the transmission, etc.
There should be no debris in the transmission beyond the filter. Note sensible caution in the WIS document regarding cleanliness. This applies to working on any transmission or hydraulic equipment. You need to be sure you don't introduce dirt. Anybody accustomed to working on transmissions understands this.
As it is obvious that you have a level of concern about this service not helped by certain comments on this thread, I will give you a compromise that while not ideal will give you about 80% of what you are trying to achieve.
Do the half change with filter at the dealer with 236.14 fluid. Examine the used fluid filter. If it IS NOT full of wear debris then drive the car for another 5000Km & drain the oil again from the pan drain plug. Do not remove the pan or disturb the filter a second time and merely refill the fluid to the correct level at the correct temperature with fresh fluid.
This will give you a reasonable level of fluid replacement.
While not ideal it is better than your present situation. One of the only problems is that mixing oxidised fluid with new fluid catalyses oxidation in the new fluid & shortens it's life. (like putting crap in ice cream)
Forget all about old generation obsolete fluids.
Good luck
Last edited by Glyn M Ruck; Feb 7, 2012 at 10:47 AM.
Do the half change with filter at the dealer with 236.14 fluid. Examine the used fluid filter. If it IS NOT full of wear debris then drive the car for another 5000Km & drain the oil again from the pan drain plug. Do not remove the pan or disturb the filter a second time and merely refill the fluid to the correct level at the correct temperature with fresh fluid./QUOUE]
This is a reasonable compromise.
For the last ditch, I did ask my MB SA to ask the parts manager to call if he can get the old fluid. My reasoning is that thenold fluid has worked well in my car for so long so they must be save.
if he fails i will use your plan-B. For 2nd flush, i do not have to change the pan and filter, right? During the first flush, do i have to ask the tech to watch for something or do anything special
Last edited by mis3; Feb 7, 2012 at 10:31 PM.


This is a reasonable compromise.
For the last ditch, I did ask my MB SA to ask the parts manager to call if he can get the old fluid. My reasoning is that thenold fluid has worked well in my car for so long so they must be save.
if he fails i will use your plan-B. For 2nd flush, i do not have to change the pan and filter, right? During the first flush, do i have to ask the tech to watch for something or do anything special
Plan B:
Change 1: Drain fluid, drop pan, change filter, clean magnet in pan, fit new gasket & refit pan. Replace pan plug with a new crush washer. Fill with 4 or 5 quarts of new fluid to the correct level using Star for temperature reading & a service dip stick. Work cleanly at all stages. Examine used filter for excessive debris. Nothing else special.
If no excessive debris on filter.
Change 2: Remove pan plug & drain fluid. Replace pan plug & crush washer. Fill with 4 or 5 quarts of new fluid to the correct level using Star for temperature reading & a service dip stick.
If there is excessive wear debris on the filter then repeat Change 1 again rather than Change 2. i.e you need to change the filter again.
Good luck
I would rate this as severe wear debris.
Last edited by Glyn M Ruck; Feb 8, 2012 at 06:11 AM.
Is the 5-minute run time suffice to mix the 2 fluids thoroughly?
Should the filter be changed again after I do the 2nd partial flsuh right away?
Last edited by mis3; Feb 8, 2012 at 10:41 AM.

No need to do 2 filter changes unless the filter is found to be in a bad way in Change 1.
I mentioned Plan-B and he said I was crazy. He would go along with this but I would have to pay for the transmisison service twice. He said the only saving was the filter. He kept asking "Why, why, why..." and he still maintained his position that the ATF for my car was "lifetime".
I really have to get a local indie for my car.
I mentioned Plan-B and he said I was crazy. He would go along with this but I would have to pay for the transmisison service twice. He said the only saving was the filter. He kept asking "Why, why, why..." and he still maintained his position that the ATF for my car was "lifetime".
I really have to get a local indie for my car.
Here's an interesting test on fluid compatibility for you. Siphon out some of you old ATF, mix it with some new 236.14 fluid (say 6 oz each). Now heat it up and stir vigorously for a while (simulating the tranny action). Leave it overnight, see if the fluids separate. To me, if the two fluids don't mix, blend together then it's not beneficial to do a partial drain with new/different fluid at all.
At the time when my car was built the 236.10 fluid was the current fluid. Times change, improvements are made. The 722.6 continued to live on, as I'm sure you know - in the high powered AMG cars - for a time. As a matter of fact, I think the 722.6 may still be used in some cars to this day. Do you really think that Benz disregarded this transmission altogether when approving the 236.14? I think not.
If you don't want to use 236.14 in yours.. hell, if you want to use off the shelf generic ATF in yours.. that's fine. But don't try to persuade others into that. Transmissions are expensive across the board but really very much so with a Benz. Sticking to Benz recommendations is the way to go.
If you read the link I sent, there is a gentleman (Eric++) who look over 30 MB shops in China and he's seen enough problem with 722.6 tranny using 236.14 fluid. He will not allow any of his shop mechanics to put the new fluid in any of 722.6 tranny.
To me 236.14 is designed exclusively for the 7-speed tranny (722.9) but somehow being thinner and of different properties will magically be backward compatible? Hmmm.

Do you honestly think that Benz would mandate the use of a non compatible fluid & use it as initial fill in the 722.6 on all W204 diesels etc. up until 2012 as an example?

Please feel free to do your kitchen table cook-up & stir crap. You will find they mix just fine.

BTW - I have not made any corrections. These are a figment of your imagination & your inability to correctly construe matters technical. Use of 236.14 fluid has increased the life of the first to second one way clutches in Taxi service on the 722.6.
Get it into your skull. The old product is obsolete & you do not know better than Mercedes Benz.
Last edited by Glyn M Ruck; Feb 8, 2012 at 05:42 PM.

Ask him to phone his counterpart at Cycle & Carriage in KL, Malaysia. He will tell him to change every 60K Km's.
Your SM would be fired in SA for saying something like that & violating the WIS.
You either need to find a competent dealer or go to a good Indy.
BTW - he should give you a reduction in labour for the second change. Not having to drop the pan saves quite a lot of time.
Here is the old MB 2006 lube chart from Vietnam when 236.10/236.12 were the top of the range fluids & the 5 speed could use either & the 7 speed required 236.12. Note change interval. (In fact for a while the 7 speed was run on 236.10)

Last edited by Glyn M Ruck; Feb 8, 2012 at 06:04 PM.
To be fair to the SA, he just repeated what he was told by the mothership.
He is not a transmission specialist nor an oil specialist. I am doubtful if there are too many SA that would understand the internal working of a transmission.
Even with a remote chance that he has an opinion of this very topic, he cannot say anything to the customers. All he can do is to notify MB Canada of his findings.

Last edited by Glyn M Ruck; Feb 9, 2012 at 02:17 AM.
140-271-00-80 Oil pan gasket
140-271-00-60 Seal ring
140-991-00-55 Pin
Since probably an indie will do this job, I will monitor the whole process. Should thes parts be changed at the first partial plush? The 2nd partial flush?


