is the 722.9 dipstick tool, the same as for 722.6?
 

I have the one for 722.6, just wondering if I can use it. Thanks!

No,
The 722.9 fluid level is checked by removing the drain plug at "25-30C trans temp" with the engine running & in Park. should have a few drops come out. If not add fluid.

Wow... sounds odd. Remove the plug under the pan?

What this correct answer indicates is that there is no dipstick tube on a 722.9.

If you don't have oil all over the bottom of your car and on your garage floor or driveway, you do not need to "check" your transmission fluid.

Fluid is added to the 722.9 via the drain plug hole, too. Special tools required, and not really a DIY possibility.

I bet that you could make a tool to do the job without too much trouble.

You'll have to see one first in order to copy it.

I believe that I could do it if I had an example of the pan (which could mean the whole car) to examine. All you need is a hose that seals to the opening, and is long enough to come out the side of the car to a funnel.

Basically the tool has an adapter that is the same thread size as the drain plug & is connected to a reservoir of fluid with a pump. Simply pump the fluid thru the adapter.

AST tools has a nice set-up for $205. www.asttool.com
they also sell just the adapter.

sort of looks like those pressurized cannisters from Home Depot for dispensing mixed chemicals.... wonder whether the adpater and one of those would not be the way to save $ if used every 2-3 years.

Also, what does anyone else know about flushing the tranny throught the transmission cooler return line?

Lots of nice tools there, but no prices. Who sells them?

AST sells their own tools. contact them.

I purchased their oil filter wrench from toolsource.com which I believe I came up with by googling their part number.

A good intro to the 722.9, along with filling instructions, is here;
http://www.mercedestechstore.com/pdfs/286_722.9/286%20HO%20722.9%20062504.pdf

br,
syljua