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How much ATF came out of your 722.6 Trans Pan?

Old Dec 30, 2013 | 12:57 PM
  #1  
Stuka Bomber's Avatar
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2007 c280
How much ATF came out of your 722.6 Trans Pan?

I had a badly leaking TCU plug and thus did not trust the volume in my trans lubrication system before tackling the TCU plug, filter, gasket, flush job.

I read all over the net that the 722.6 trans pan capacity is between 3.75L and 4L. I have currently added 3.78L to my system and the dipstick is reading above max at 80C when the pan is only at 64C.

Side note, I cannot get the pan temp to rise above 64C for some reason. I took a 20 mile drive in the car and the pan temp still would not climb above 64C with an ambient temp of 35F.

Two questions,
1. How much fluid came out of your pan when you did the filter job (please specify L or QT.).
2. Any ideas why I can't get my tranny fluid up to 80C?

Thanks Guys!
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Old Dec 30, 2013 | 02:51 PM
  #2  
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From: 1 hours drive north of Sydney Australia
2007 W204 220CDI Classic Sedan
Originally Posted by Stuka Bomber
I had a badly leaking TCU plug and thus did not trust the volume in my trans lubrication system before tackling the TCU plug, filter, gasket, flush job.

I read all over the net that the 722.6 trans pan capacity is between 3.75L and 4L. I have currently added 3.78L to my system and the dipstick is reading above max at 80C when the pan is only at 64C.

Side note, I cannot get the pan temp to rise above 64C for some reason. I took a 20 mile drive in the car and the pan temp still would not climb above 64C with an ambient temp of 35F.

Two questions,
1. How much fluid came out of your pan when you did the filter job (please specify L or QT.).
2. Any ideas why I can't get my tranny fluid up to 80C?

Thanks Guys!
You have answered your own question regarding temp. The ambient air temp is too low & there are too many heat losses to achieve 80'C.

You can remove a little fluid by drawing (sucking)it out through a long piece of very clean 5-6 mm plastic hose.

Here is a little write up I did after changing the ATM fluid. :-

Mercedes 220 CDI Changing ATF 50,000 km/4 years.

Did my first MB ATM oil change yesterday at 4 years / 50,000 km. ( M.B sheet suggests 3 year/50,000 km) Not a lot different from the Peugeots I have done over the years.

I write this to share the experience & benefit of leaving the auto transmission drain for an extended period to maximise the amount of oil drained. There is no torque convertor drain.

I checked the level on the dipstick( 25'C ) before- hand & it seemed a little over filled . The filler cap tell tail was broken so the dealer mechanic must have topped it up after the rear gearbox seal was renewed during warranty.

I dropped the drain plug & after about an hour or so 3.375 litres had drained.

I left it draining over-night ( 19 hours) & recovered a further 1.5 litres.

A further .75 litres was found in the pan when removed.( carefully!)

Oil retained in the filter was .125 L

Making a total of 5.75 litres drained.

I refilled using 5.75 but after obtaining running temp ( 80'C) found the level a little high as anticipated . I siphoned out .250 L from the dipstick tube to show a level at the high mark ( 80'C).

To summarize :- 1. 1.5 litres extra was drained if left for an extended period. Experts may be able to tell me if this oil came from the torque convertor?.

2. 5.5 litres of oil was required to fill the GB to the top of the 80' C mark . WIS states that approx.. 5 litres is required to fill the gearbox after draining !! . But they do not state how long to drain. Oil was still dripping from the drain after 19 hours.

3.Wis states that the GB holds a total of 7.5 litres including torque convertor therefore 73 % of the oil was changed.

4.If just draining from the drain plug & not removing the pan 62% of the oil would be drained.



I used Fuchs Titan AFT 4134 @ A$14.30 / Litre.( 20 litre box)

Transmission Dipstick from KTC Auto Tools USA $20 + $15 postage to Aus.

ATM oil filter A$30.31

ATM gasket A$32.34.

Lock pin A$ 2.20.

Total cost for changing ATM oil = A$ 143.50. ( excluding .25 L siphoned out & dipstick cost ) including the pleasure & experience gained doing so.
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Old Dec 30, 2013 | 03:23 PM
  #3  
Stuka Bomber's Avatar
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2007 c280
Well now I'm further confused on how I should make sure my trans is full. I didn't let it drip overnight as I was outside doing the work. Didn't want contaminants blowing up in there.

Can the fluid level reliably be checked at 25C? I think I'm going to remove fluid until I'm low and keep adding At 25C.

Thanks!
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Old Dec 30, 2013 | 04:05 PM
  #4  
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From: 1 hours drive north of Sydney Australia
2007 W204 220CDI Classic Sedan
You cannot be too far out level wise with the 25' method. I suppose that's why its there.

I would not go too low if at all,before adding .

Last edited by Carsy; Dec 30, 2013 at 04:43 PM.
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Old Dec 30, 2013 | 05:33 PM
  #5  
Stuka Bomber's Avatar
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2007 c280
Well I pulled another 700ml out of the trans and the dipstick is now showing half full when the outside of the pan is 25C. Problem is, I have no idea if the fluid is 60C and the outside of the metal pan is only showing 25C because it's so damn cold out. I literally have no idea what's going on with my trans level.

So I now have a total of about 3300ml in it, outside of pan is 25C but the line is halfway between 25 and 80. I'm not pulling anymore fluid. There no way it's over filled anymore.

Dealer wants 2 hours pay just to check the fluid level. Fml.

EDIT: I just pushed my wife's 73 super beetle outside, threw a tarp on it, and moved my mercedes in. Surrounded the Marc in space heaters and I'll try it again after work tomorrow with the garage all toasty.

Last edited by Stuka Bomber; Dec 30, 2013 at 06:01 PM.
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Old Dec 30, 2013 | 11:09 PM
  #6  
Carsy's Avatar
MBWorld Fanatic!
 
Joined: Mar 2008
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From: 1 hours drive north of Sydney Australia
2007 W204 220CDI Classic Sedan
Originally Posted by Stuka Bomber
Well I pulled another 700ml out of the trans and the dipstick is now showing half full when the outside of the pan is 25C. Problem is, I have no idea if the fluid is 60C and the outside of the metal pan is only showing 25C because it's so damn cold out. I literally have no idea what's going on with my trans level.

So I now have a total of about 3300ml in it, outside of pan is 25C but the line is halfway between 25 and 80. I'm not pulling anymore fluid. There no way it's over filled anymore.

Dealer wants 2 hours pay just to check the fluid level. Fml.

EDIT: I just pushed my wife's 73 super beetle outside, threw a tarp on it, and moved my mercedes in. Surrounded the Marc in space heaters and I'll try it again after work tomorrow with the garage all toasty.
When the chips are down you just have to have your priorities right. Well done !!
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