722.9 Transmission Fluid Change Questions

[Jim2]

Hi all, a few questions for anyone who has already carried out an oil change on the 722.9 Transmission. The car in question is 214 MB E class 220, W212 with the 722.9
Transmission.
In the BEVO List , there are two MB approved specs listed for the 722.9 trans, 236.14 and 236.15.
236.14 0 Automatic transmission fluids (ATF, CVT) ( CVT= older transmission's?? , using Red Fluid? )
236.15 0 Automatic transmission fluids (ATF, Transfer/automatic)
I'll presume that the 236.15 is the correct spec fluid to use? As in "Factory Approved Mercedes-Benz MB 236.15 fluid spec. Used in special 7G-tronic with ECO stop-start (NAG2FE+) transmissions."
Does this description match the car mentioned above? It does have ECO stop-start, but how will be able to tell if it is NAG2FE?? And this fluid is Blue in color?
Some of the kits I see advertised also show a drain plug for the TC, but I presume ( again) that this plug would apply to much older model's? If so, then is it possible to change the oil in the TC and pipes using the same method as in the 722.6 Transmission's? IE: via the return pipe from the radiator back to the trans?
Any particular problems I should look out for? or any tip's?
Thanks for your help.

 

[Wighty]

Can't help with the gearbox questions Jim , but if you were to order the oil and parts from MB first time with your VIN number , they would send the correct specs for your car .
You can then note down part numbers for next time to shop around

 

[Gazwould]

7g with Stop start is 7g+ so the blue 236.15 .

Save alot with a very safe bet considering Fuchs was a Co developer of this thin ATF .

 

[Jim2]

7g with Stop start is 7g+ so the blue 236.15 .

Save alot with a very safe bet considering Fuchs was a Co developer of this thin ATF .


View attachment 61195

Will do that Gazwould. Its not due for a change just yet, but I'm gathering the bits and bobs now. Engine oil and filter not due either for 190 days, and as its comparatively simple job to do, no harm getting a change in early, and then I'll know where I stand with it. 1st impressions are that its a beautiful car to drive, I'm still getting to know how all the electronics work, But overall, looking good !!
Thanks Gazwould.

 

[Jim2]

Can't help with the gearbox questions Jim , but if you were to order the oil and parts from MB first time with your VIN number , they would send the correct specs for your car .
You can then note down part numbers for next time to shop around

Yes Wighty. Just got some very good advice from Gazwould, so will go with that. Now to I can find out if I can use the same method I have used in the other MB with the 722.6 transmission to change the TC oil in the 722.9.........

 

[Wighty]

Better get a cheeky little diff oil change on the new baby as well buddy

 

[Jim2]

7g with Stop start is 7g+ so the blue 236.15 .

Save alot with a very safe bet considering Fuchs was a Co developer of this thin ATF .


View attachment 61195

Me again Gazwould,,,just did a search for the Fuchs ATF, and came up with this, What do you think? Is it the "real deal" or too good to be true??

 

[Jim2]

Better get a cheeky little diff oil change on the new baby as well buddy

As far as I remember, it has already been done, according to the service sheet's that came with the car ( will have to check ) but its no big deal to change it either when I have it off the ground. And that can be crossed off the "To Do" List.

 

[Wighty]

https://www.ebay.co.uk/itm/20-1x20-...305921&hash=item4d9a2126b6:g:ixsAAOSwrWFeO9vI

 

[Jim2]

https://www.ebay.co.uk/itm/20-1x20-...305921&hash=item4d9a2126b6:g:ixsAAOSwrWFeO9vI

Done!! Now if anyone has the part Nrs for the gasket, filter, and bolt's?

 

[Wighty]

Done!! Now if anyone has the part Nrs for the gasket, filter, and bolt's?

Try MB Newcastle eBay site buddy

 

[steveq]

Hi,

This is what you need in terms of filter, gasket, bolts, etc.:-
https://www.ebay.co.uk/itm/Genuine-...rentrq:f25658bd1730a6e67f3a1972ffffe2ae|iid:1

You will also need an adapter to bolt into the sump plug hole and a pump to put the new ATF in.
You will need a low range torque wrench for the sump bolts.

 

[steveq]

There should be a TC drain bolt in your 7G+ gearbox (AFAIK).
You'll need a friend to turn the crankshaft while you watch for the TC drain bolt to come into sight.

 

[Jim2]

Hi,

This is what you need in terms of filter, gasket, bolts, etc.:-
https://www.ebay.co.uk/itm/Genuine-Mercedes-Benz-722-9-Automatic-Gearbox-Service-Kit-From-2011-NEW/131860710362?_trkparms=aid=111001&algo=REC.SEED&ao=1&asc=20160908105057&meid=19ac842d84854dd48f79cb20d57ac8a3&pid=100675&rk=1&rkt=15&mehot=none&sd=131860710362&itm=131860710362&pmt=0&noa=1&pg=2380057&brand=Mercedes-Benz&_trksid=p2380057.c100675.m4236&_trkparms=pageci:60713cda-defc-11ea-8293-e6378def4d3c|parentrq:f25658bd1730a6e67f3a1972ffffe2ae|iid:1

You will also need an adapter to bolt into the sump plug hole and a pump to put the new ATF in.
You will need a low range torque wrench for the sump bolts.

Hi steveq, WOW,, thats some bargain !!! £62,,,,,unfortunately, I'm only after seeing it now and have already sourced most of what I need, I went for the Fuchs Titan ATF7134 Fe as recommended by Gazwould @ €137 for 20 ltrs, and sourced locally the filter and gasket @ €38, the Adapter @€8. Only items outstanding now are the sump bolts, sump plug washer, the plastic oil level tube,and the TC plug. I have a pumping set up ( electric pump and plastic piping ) ditto Torque Wrench,,,,,have a trip planned next monday ( Covid -19 willing..) to the nearest MB dealership where I'll ask them to check the service history via the key, and see what that tell's me. I have the hard copy records, but only up to 2018, and according to these, I have 190 days until the next engine oil / filter is due....based on the 40'000 Transmission interval, I still have about 7'000 Miles to go, but like I said, I hope that all will be revealed / confirmed in the dealership's next monday.
There is just one comment I have to make about your post steveq ( Thanks for your input BTW ) on other sites that I have looked at ( MB of Newcastle etc) they all make comment about the kit they are advertising either being suitable or unsuitable for stop/start vehicles, even when its under the same heading IE:- 722.9 transmission fluid change kit from 2011 onwards.
Anyway, Thanks again, you have been most helpfull !!!

 

[Jim2]

Try MB Newcastle eBay site buddy

I've done that Wighty, and got all the part Nrs that I need, Thank's...I'll keep you ( and the forum ) posted on progress !!! ( I'm assuming that there WILL be progress !!! )

 

[Jim2]

There should be a TC drain bolt in your 7G+ gearbox (AFAIK).
You'll need a friend to turn the crankshaft while you watch for the TC drain bolt to come into sight.

Yes, I can organise that alright,,,but it seems that for some strange reason ( MB Thinking??? ) not all of these 722.9 transmissions actually had the drain plug in the TC....anyway to find out, I wonder, except by removing the oil pump ( BTW, anything to watch out for in that little operation? ) Or is it a simple undo a few bolts, pull down the pump, and when finished, push it back up in place, and bolt it up?

 

[steveq]

Hi Jim,

The kit in the link I posted above has a different coloured stand-up pipe (green) and a TC drain bolt replacement. The green stand-up pipe is for the later sump pan shape (I think).
The TC drain bolt is in the kit because the 7g+ has a TC drain (the two I did had). I don't know whether the 7g has a drain bolt or not.

On you question regarding the pump :- There are 3 bolts holding the pump on and an electric cable. Remove them and make sure you get the 2 small pipes which are about an inch long. It is easy to miss them and let them fall into the pan you are using to collect the used ATF. When you remove the pump you will see the TC.
When you have drained the TC you put in the new drain bolt, torque it up and refit the pump.That's it. There is no gasket on the pump to gearbox joint.

You will need 9 litres of ATF. Maybe get 10 as you need to overfill and let the excess spurt out.

 

[Jim2]

Hi again Steve... as far as I know, this is the box that is in mine , ( got the details when I was trying to make sure that I got the correct fluid) " Factory Approved Mercedes-Benz MB 236.15 fluid spec. Used in special 7G-tronic with ECO stop-start (NAG2FE+) transmissions." And mine is definitely ECO stop / start , so from what I've seen on U Tube etc. re fluid changes, they all have the the newer sloped pan, and the green colored stand-up pipe, so maybe I'll be lucky with the TC having a drain plug. At the very least, it will save minimum 3-4 litres that would be lost if I have to use the cooling pipe to flush it out.
These two pipes are what is linking the pump to the body? With seals on them? And they can fall out when its pulled down from the housing? or are they located some where else on the pump? I've never done this particular job before, so please excuse all the questions.
BTW, mine is a 2014 E class w212 220 CDI Blue efficiency, if that makes matters any bit clearer.?

 

[steveq]

I think the pump maintains fluid pressure when the engine is off in a stop/start situation.
The pump is quite small -- maybe 4 inches X 3 inches.
It has to be removed to gain access to the TC drain bolt.
Here is a photo of the pump:-

This is the view you will see from under the car.

And this is the pump viewed from the side that connects to the gearbox.
Note the 2 black pipes. They are identical so it doesn't matter if they get mixed up.
They can come away with the pump or stay connected to the gearbox or else fall into the old ATF drain pan.

Make sure they are in-situ when you are refitting the pump.

 

[steveq]

The 7g+ was fitted to the W/S212 E Class from mid/late 2011 onward. Your 2014 E Class will definitely have the 7g+.
For the new W213 (2016) with the 2.0 litre engine MB switched to the 9g gearbox.