About 7G ATF change

老李，真是有研究精神我的標杆!!

Just to add my 2 cents....I've read some people couldn't drain the TC because they have the auxiliary pump for Stop and Go in the way. My C207 has it. It's really very simple/easy to remove.....

Disconnect the harness, remove three bolts, pull straight down. That's it. Follow the posted instructions from there.

Tip, if you're solo rotate the crank from underneath. Not from the top. You'll be able to see the TC plug no problems.

There's also another thing: if the entire AT requires from dry fill 9 ltrs in total, putting 10 ltrs (6+4) even if only for seconds, could damage the AT? Spaces seems really tights in transmissions, so the exceeding litre could do damages probably. I don't know, I think WIS is really bad written in this case unfortunately

Thank you. This is exactly what I was fearing. Going too high in temp. Probably the best way is pumping 6 ltrs, starting the engine a few minutes, and then pump the other 4 ltrs before reaching the 45° Celsius. I'm asking myself if the official MB procedure (at dealers) is to replace only the 6 ltrs in the sump, or if they replace also TC oil, I mean as standard procedure. WIS seems not so clear, because it seems that you have to add the 4 ltrs only "after trans and converter have been replaced" (quoting). In fact I found some Febi service kits for oil change with only 6 ltrs. Anyway I'll do the complete job. Thank you :-)

Hi everyone :-) I have a 722.996 trans on a w204 (7g plus). I don't understand honestly how WIS divides in two parts the filling of oil. It says to put initially 6 liters, start the engine, than turn it off, and then fill another 4 liters. But it says to fill the 4 ltrs when atf is already at 45°C, so in the meanwhile you finish filling, you go past the correct temperature. Are we sure that filling in one step the 10 ltrs is the same? Thank you very much for help

Hi again Leigh. Did you have much trouble using the HDX 2 gallon pump sprayer to fill the ATF? I notice that you have an alternate fluid pump in your tool list that is much more expensive with pneumatic connection and pressure guage. Is this because the HDX was difficult to use? Would you use the HDX pump again?

Finally, the Xentry program you're using is now several years old I'm assuming. Since it can't be officially authorized or updated, is is still active? Is it worth the investment knowing that it may eventually cease to work? Has your software vendor a way to authorize it/update it? Thanks for your advice Leigh. What a great site you have!

Hello Sr Leigh. What do you think of filling new ATF through the dipstick using a small funnel? No pump, quick disconnect, tubing and fill adapter needed with this method. Thoughts?

My pleasure.

Agreed, a very small amount that will drain completely when rotating the engine slightly.

I used a tube like this fella did in his video: https://www.youtube.com/watch?v=VQHqF9f4C_U&t=484s&ab_channel=pukpukky

The rubber plug has been removed.

I never removed the pump, no reason to as there is an access plug just up the bellhousing on the right side of the vehicle. You have to fashion a rubber hose to place over the drain when you remove the screw otherwise it will make a mess.....You can see the rubber access plug, it is rectangular and appears just up the side of the bellhousing. Some fluid does run down the torque but it drains through an opening in front of the aux pump. A good shot of brake cleaner after a new screw is in place will flush out any remaining ATF. Otherwise, I guess you can take off the pump. Some torques don't have drain plugs, it is easier to check using the rectangular plug instead of pulling off the aux pump. The only other difference with the biturbo engine is the intercooler blocks the lower crank bolt. I used the alternator nut to carefully turn the engine to position the drain screw.

Yes it does have the start/stop pump. If you look at your post, step 5, the photo showing the torque screw. The rectangular rubber access plug is visible in your photo!

Does your E400 has start/stop eco function? Do you have a photo of your drain plug?

I changed my 2016 E400fluid. No need to remove the aux pump to drain the torque, there is a rubber plug (you can see it in your video too) in the 5 o'clock position on the bellhousing that gives access to the torque drain screw.