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I have heard the correct transmission oil level can only be measured with diagnostic equipment and the dipstick is used as a rough check during the initial fill.
Not sure where the plug is to remove to use the temporary dipstick.
In order to check the fluid in the transmission you need the Mercedes Benz dip stick. It's a special tool needed for all the 722.6 transmissions. Best thing is probably to just stop by a Mercedes Independent shop where they can check it real quick. It uses a synthetic based fluid. I always go with the factory fluid.
Crawl under the car and remove the front and rear splash covers under the engine. The forward panel is held by 6 studs (2 shared with the rear panel) and this has to come off first. The rear panel is held by another 4 studs, and the sump drain plug is concealed by this panel.
Mercedes have purposely not put a transmission dipstick in their cars...to STOP any unauthorised persons from tampering with transmission fluid levels.
Electronic transmissions are extremely temperamental - if incorrect type, level is too low (or too high), this will accelerate premature wear and tear, not to mention erratic shifting behaviour.
For this reason, only Mercedes service agents have the required workshop tool (ie dipstick) which they insert into a tube in the transmission, to check levels.
If you happen to obtain the correct tool for your own use....please ensure you use only Mercedes specified fluids....and NEVER overfill the transmission case.
Hi,
Joe here to help,
The ONLY oil you should use is Mercedes transmission oil. As far as how much to put back in, 4 qts if you do it right away, 4.5 qts. if you let it drain a while.
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