722.9 Transmission Fluid Change Questions

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Jim2

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That assumes that the previous person had put the correct amount of ATS in the box .... ;) Never assume ;);)
I mentioned that in my original post ,nr #56.EmilysDad.But you are right, it cannot be stated enough.
 

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Thank you, my only doubt is that I'd like to follow the wis procedure (6 litres first and then the other 4 litres and not 10 all in once). But it's not clear if the remaining 4 litres have to be added with engine on or off.
Probably it makes no difference
 
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Have you removed 10 ltrs from it? Yes, you can fill 6 ltrs, then start the engine and add the balance with the engine running....important thing is that it's at the correct level and temperature when it's checked.
 

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I still have to do it :) Anyway I was planning to do the opposite:
- add 6 litres
- start the engine in P a few minutes
- turn off the engine to work with calm (otherwise it will reach 45°C before I finish filling it
- fill other 4 litres
- turn on the engine and go thru gears
 
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I still have to do it :) Anyway I was planning to do the opposite:
- add 6 litres
- start the engine in P a few minutes
- turn off the engine to work with calm (otherwise it will reach 45°C before I finish filling it
- fill other 4 litres
- turn on the engine and go thru gears
The way I did mine was fill 5-6 litres,start the engine and continue pumping the remainder,, leave it run for awhile with the iCarsoft connected to monitor the temperature, when it reached 45c I opened the drain tap,and then either topped it up, or drained it to correct level. Admittedly, the temperature window is fairly tight, but eminently doable.
 

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Do you think that I could do damages with the sequence I described?
I'll try to be quick to follow yours. Thanks again really
 
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Do you think that I could do damages with the sequence I described?
I'll try to be quick to follow yours. Thanks again really
The thing is, once the engine is running, it will very quickly fill the TC from the transmission sump, leaving the transmission oil level a bit low...so that's why after pumping in the first litres, ( and I don't mind if its more than 6 ltres) I start the engine and continue pumping the remainder of the oil.
Actually, if I have a helper in the drivers seat, once I've pumped the first 6 ltrs, I'll tell my helper to start the engine,and I'll stay pumping.
 

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Very clear now. Thanks again!
 
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The thing is, once the engine is running, it will very quickly fill the TC from the transmission sump, leaving the transmission oil level a bit low...so that's why after pumping in the first litres, ( and I don't mind if its more than 6 ltres) I start the engine and continue pumping the remainder of the oil.
Actually, if I have a helper in the drivers seat, once I've pumped the first 6 ltrs, I'll tell my helper to start the engine,and I'll stay pumping.

Very clear now. Thanks again!
Theres one thing I should mention, after filling to the correct level, and disconnecting the pump and tap, do not switch off the engine until the sump stud is firmly in place.......other wise, once the engine is switched off, and the stud not in place, the oil will pour back out , same as when you remove the stud during an engine oil change.
 

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Job done. In the end I put about 8.8-8.9 litres of fresh oil. Probably the car was not perfectly level because I had a problem with the level, but I don't think it's significant. I pushed initially 6-7 litres, I turned engine on in P, let it reach about 40 °C (it took 4-5 minutes), then I pumped the remaining until 10 litres, changed all gears, and did the level at 45°C. I'm curious, supposing that oil level is under the right level of about 100-200 ml, of what could be the symptoms. Car runs like before, probably even better. Good luck
 
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Job done. In the end I put about 8.8-8.9 litres of fresh oil. Probably the car was not perfectly level because I had a problem with the level, but I don't think it's significant. I pushed initially 6-7 litres, I turned engine on in P, let it reach about 40 °C (it took 4-5 minutes), then I pumped the remaining until 10 litres, changed all gears, and did the level at 45°C. I'm curious, supposing that oil level is under the right level of about 100-200 ml, of what could be the symptoms. Car runs like before, probably even better. Good luck
Personally, after putting in the initial 6-7 ltrs, and starting the engine, I continue pumping the remainder in, because it will fill TC very fast, and I would rather not run the trans while it's 3 or more ltrs short, while it's reaching the correct temperature. You'll probably be OK though, it's not like you drove it several miles with low oil levels. Good luck j
 

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I remember that you told me this thing, but I didn't understand why WIS would split the procedure in this two steps. When I put the 7 ltrs oil was already at 33°C, so it took really a few minutes before I pumped the other 4 ltrs. On youtube quite everybody changes all the gears with only 6 ltrs (huge mistake), so if they didn't destroy their transmission neither should I. Probably I made a mistake waiting too many seconds, I hope not. Thank you
 
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I remember that you told me this thing, but I didn't understand why WIS would split the procedure in this two steps. When I put the 7 ltrs oil was already at 33°C, so it took really a few minutes before I pumped the other 4 ltrs. On youtube quite everybody changes all the gears with only 6 ltrs (huge mistake), so if they didn't destroy their transmission neither should I. Probably I made a mistake waiting too many seconds, I hope not. Thank you
The first MB transmission change that I ever did was coincidently on the first MB that I ever bought. A 2010 E 200 CDi.with the 722.6 transmission. No way to change the oil in the TC,( no drain plug) so it has to be done via one of the two pipes leading to the oil cooler radiator. So you disconnect the return pipe, link it to a plastic bucket. Start the engine, and pump out 2 ltrs, switch off the engine, replace the 2 ltrs of used fluid with 2 ltrs of new fluid. Repeat until the new fluid appears. And this is where I learned just how fast the fluid is pumped through the system. So I applied this when changing the fluid in the next MB I bought 18 mths ago. But this is just my personal experience, but if you're happier with WIS, that should be OK too. After all, they are the experts. Let us know how it goes for you,
 

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It's an interesting point and people who'll read this topic will find it useful. I think you're right about how fast oil circulates. Probably WIS splits in two steps because 10 ltrs can't be contained in the sump all in once. But I'm no expert about this. In Meyle Youtube tutorial they did like I did, but there's no warranty of correctness about this. I think your method is the safest. Only time will tell. Thanks again for all the tips :)
 

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