Johnand's excellent DIY 722.9 7G-tronic 7-speed automatic transmission service thread with WIS documents attached:

https://mbworld.org/forums/c-class-w...+722.9+service

 

Level is checked by spill over method at correct temp from beneath. Use IR thermometer or similar on pan to take temperature as an alternative to Star DAS.

The use of 236.14 fluid is mandated. Ryder fleet products have by far the best deal on this product by Shell at under US$ 6 per quart. Most dealers are charging over $20/quart. The Shell product is fully approved. Many use Fuchs Titan 4134 as well.

See description. It is Shell product in a Shell container - Pennzoil is owned by Shell. Many have confirmed correct product in Shell packaging on receipt.

http://www.ryderfleetproducts.com/ry...oductDetail.do

 

Just cobble up a large syringe/oil pumping arrangement with a flexible tube on it & get the car on a hoist. All you are doing is replacing a workshop air operated pump. Observe temperature requirements in the attached pdf.s to Johnands DIY thread and above. Read pdf's in detail - all will be plain.

 

Found this detailed description of the 722.9 auto trans on the web. Likly already in Johnands thread. Includes some off MB doucument pages, posted by Glyn as necessary.

MERCEDES-automatic-transmission-722-9

.

 

Yep - That's one of the training programs for techs that I got from MB & have used.

 

 

W209 - https://mbworld.org/forums/clk-class...s-60k-kms.html

W204 - https://mbworld.org/forums/c-class-w...s-60k-kms.html

W203 - https://mbworld.org/forums/c-class-w...s-60k-kms.html

 

Glyn

I just found in another thread where someone who just had a transmission service found that he was charged for 6 quarts of fluid and the concensus is that they must have not done the torque converter as it should have taken 9 quarts.

Does this sound right and does it apply to my 2008 C300????

https://mbworld.org/forums/c-class-w...-done-but.html

 

I querried my C350 and was told not all W204's with this transmission comes with the TC-Plug, so 6L Fluid.

I was invited to bring car and they show me, I will do that.

What now ?, is my question.

 

Your car will have a TC drain plug.

 

Thanks, they offered to redo the job if there is a plug.

 

I have never seen a W204 without a TC drain. Only very early 722.9 transmissions fitted to the S Class before the W204 launch.

 

Glynn, I 'believe' I have the 722.9 transmission in my 2007 R W251. Does the 'reprogram' work on this transmission as I do with my 2004 W209 5-speed? (key to 'on', push throttle to floor, hold 5 seconds, turn off key, release throttle, wait 2 minutes before removing key) Works great in the 5 speed to get rid of 'granny' mentality!
Thanks! Jerry

 

Does RWD have to worry about this? Or this is just 4matic thingy?

 

https://mbworld.org/forums/c-class-w...n-service.html

 

Whats the overflow pipe do?

 

Great read fellas.
Just one question tho'.
Where do I get the updated pan from, other than the local stealership?
What price are they in the US? The cost here in Aus is crazy - like $200+

 

Hello, I just bought CLK 270 cdi, 2004. I haven't received it yet, it has automatic transmission, does it have 5 or 6 gear?

 

You can order it on the web, parts.com had it for $40US (msrp $50). I don't know if that comes with redesigned spill tube or not though.

 

So draining torque converter is part of traany servicr for clk550 2007

 

I replaced transmission fluid on other car before. Here is what I did measure the amount of fluid coming out and put the same amount back in. Sounds simple...right. Why can we do the same on Mercedes?

 

Hi Folks, simple question but I can't seem to find the answer.

Can I determine if my trans uses blue or red from the VIN?

WDD2040772A658173

....Found it 236.15 blue for post 21st June 2010

 

Hi, I just completed the service on my 722.9 transmission on my CLK 350. I followed the method described in Scott Elliott's terrific YouTube video and all went really well. I have a couple of further tips that may be of use to others following the same method:

1. Torque Converter draining: Finding the T/C drain plug without an assistant as I did was made much easier by doing it by feel - I had to be close to the front end of the engine to supply sufficient strength to the breaker bar to rotate the engine (and therefore you can't see into the little T/C inspection window) - but I found it quite easy to reach back into the opening with my free hand and just feel the T/C surface as I slowly rotated it with the breaker bar. This way you really can't miss the plug.
2. Transmission cooler flush using compressor air - forced fluid: In the video Scott uses a conical rubber fitting on a metal tube to hook up temporarily to the cooler line for the flush. I found it much easier to use 12mm clear tube (instead of 10mm) which fits just nicely onto the cooler line over the o-ringed end. This allowed me to not have to shift the cooler line end as far away from the transmission, as I could easily curve the vinyl tube onto the line fitting. I didn't worry about damaging the o-rings as I replaced them when I finished the flush part (just a couple of $).
3. I used new factory pan bolts as I wouldn't trust the different expansion rates if substituting steel as Scott did. I also used MB fluid, as here in Australia the difference was only about $40 dearer than the aftermarket fluid.

Hope the above helps. Thanks everyone else who has contributed to this body of knowledge over time.

 

• when we opened the pan drain, quite a bit of oil came out. Why would this be when the level should only have been to the top of the filler tube,especially when cold? Would it have been overfilled at factory, or is there some other reason.
• The oil was not too black, and there was little or no metal sticking to the magnets. Maybe I am lucky, but it did make me wonder if the change had been already made for some reason.
• I had trouble getting a filler tube, so we made one from a nylon bolt with the correct thread and drilled a hole down the middle.
• We used my son’s car lift, which allowed us to sit underneath to work. I am not sure how we would have managed without it.

Again thanks to contributors, and if anyone knows why the old oil would have been high, I am most interested.
cheers.

• When we removed the pan plug, there was a gush of ATF. This surprised me as I expected there to be no oil above the filler tube,especially when cold ! Can anyone suggest why the oil would be at that level?

 

My theory re your question about the level and your surprise that fluid drained at the first drain plug removal when cold:
The level is checked when running and therefore fluid is "in place" in the various valves and actuators and also above the natural drain level of the T/C as it is being pumped around in the transmission. When the transmission is stopped (engine off) the fluid drains back down into the pan as it is no longer "in use" in the mechanisms above the normal static fluid level. The static fluid level (even when cold)) would therefore be well above the top of the fill tube. If you look at the You tube videos you will see all of them (at least those that I watched) would drain maybe 1 to 2 litres at the first removal of the drain plug. Mine certainly did exactly that.