Tranny oil change
Different ATE is required for automatic transmission 722.6 (see Specifications for Service Products).
The ATF need never be changed, i.e. it is a lifetime fill.
The cap on the oil fill tube is secured with a tamperproof seal.
No oil dipstick is installed to check the ATF level.
An oil dipstick is available as Special Tool.
An oil condition counter is incorporated into the transmission control module.
Note:
The checking or correcting of the oil level should be performed at authorized MB dealers only.
Using the HHT (Hand-Held Tester) at the data link connector (DTC readout), the oil condition counter can be read and reset if desired. This is a measure for determining oil aging.
To remove the lock pin the top will break off, then you can push the pin down into the cap which will release the lock pin and allow the cap to be removed. Look up the part #'s for photos and you will see the lock pin design. Also I used ONLY MB fluids from the dealer or supplier that has MB fluids. I think autohause has this fluid,,dont' remember.
This is an easy job and hard to mess up. Just follow the manual to replace the new gasket and filter. Don't forget to reinstall the magnet.
I did not remove the drain plug didn't have the correct hex at the time,, just removed the pan.
The total job should take about 2 hrs including jacking.
You will also need the "tool" to check the transmission fluid level on refill.
I have seen them on ebay for as low as $20.00. I did not do a flush but only drain and refill as I have done for the last 35 years on all my auto transmissions. I always figured changing 1/2 the fluid was better than no change at all. Besides you can always pull the drain plug and refill w/o pulling the pan or filter for a quick change later.
I have about $85 in the parts so far and that will probably approach $135 + as I may need additional oil (and now a cap). I bought 5 liters of M-B OE oil and a tranny filter / gasket. Can anyone tell me the amount required for a driveway change (as opposed to an exchange)? The manual states 7.5 liters but I have no idea if that is drain / refill or total capicity.
I agree that an exchange would be better. Frankly, I would be floored if the dealer accepted anything south of $250 for the work. Since I will need a part (filler cap) from them anyway, I might as well ask. Frankly, I avoid service writers as much as possible as I cannot stand people that insult my intelligence. Nevertheless the one encounter I had with the local dealer went well.
May I assume that the drain plug is a metric female hex that requires an allen type wrench? The thought of wrestling a gallon plus of fluid sloshing over the top of the pan is not very attractive.
I would invest the money in a dipstick if I can find one. If not, I will probably fashion one from copper wire and try it out before I empty the pan so that I have a reference point. Necessity is the mother of invention.
I do not have any issues with the tranny (2003 E320 with 29,000) . I am hoping that a little preventative maintenance will produce a dividend later down the line. Maybe changing the filter will remove any latent casting trash and or other contaminents. The last filter I replaced (non M-B) had media the size of hardware cloth. I guess it would catch the larger chunks of a converter explosion. I like the car and unless it produces a lot of symptoms that have been well documented here, I intend to keep it for a while or until my wife wrecks it.
May I assume that the drain plug is a metric female hex that requires an allen type wrench? YES
The thought of wrestling a gallon plus of fluid sloshing over the top of the pan is not very attractive. Really isn't that difficult as it is very well designed
I would invest the money in a dipstick if I can find one. If not, I will probably fashion one from copper wire and try it out before I empty the pan so that I have a reference point. Necessity is the mother of invention.
IF you are going to invent,, don't use copper wire. Use flex clear plastic tubing from the local hardware store that will flex. But I would just buy one off of ebay for the $20+ shipping. It is good to use the correct tools.
smash:
For the dealer doing the flush for less than $150? I don't know how,, if the total capacity is 8 qts at $20/qt the fluid alone will be $160,, + filter / gasket at about $35 = close to $200 for materials they will charge. My dealer charges $100+/hr for labor and this would be charged as min of 2 hrs so my charge would be $350+ for this fluid change. So if you can get all of this for $250,, then let them do it if that is your preference.
Best of luck
Thanks again for taking the time to respond. I will definitely record what comes out and add a few oz. to cover loss from the filter. My research from comments posted here indicates that about 1/2 of the fluid stays internal. Too bad M-B eliminated the converter drain plug.
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Quality dipstick $40 with trans diy tips from me delivered.
To the member above that is looking to do it at 30k miles wait till 50k
to any member that wants to make their own tool please make sure you get it right being off is death to the 722.6 latest word from mb is to be at the upper most line at 80C not beyond it.This is for best shift quality and foam prevention,so if you make your own dipstick how will you know the proper line?
What if your transmission that you use to calibrate the tool is low on fluid?
autohausaz.com has the proper mb spec fluid for $15qt.
do not use anything else.

Just be happy you don't have the newer trans with no dipstick spout at all
The dealer has you on that one cuz it can only be filled with a special pump through the vent tube on the pan.
Last edited by ohlord; Apr 5, 2008 at 07:48 AM.



