E280 CDI 2007 - 722.9 Transmission service- Fluid level ?
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From: India
W211 E280 CDI
E280 CDI 2007 - 722.9 Transmission service- Fluid level ?
For a general fluid service, what is the correct transmission fluid level when the torque converter is not drained, and how much is required if the torque converter is drained as well?
The mechanic says not to drain the TC. Pls advice the exact level on both scenarios.
TIA
The mechanic says not to drain the TC. Pls advice the exact level on both scenarios.
TIA
Last edited by OG_Merc_Fan; May 21, 2025 at 06:02 PM.
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Joined: Dec 2024
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From: 714/949, SoCal
2008 S211 4MATIC
based on this link:
https://www.fcpeuro.com/blog/mercede...0pan%20adapter.
i agree with your mech not to touch the TC. if you want to get to that fluid, do a drain/fill, run the engine for a few days, then do another drain/fill. repeat until you're happy. a complete, sudden new fluid change can shock the transmission!
https://www.fcpeuro.com/blog/mercede...0pan%20adapter.
The trouble with the 722.9 transmission is that servicing it can be a hassle because it does not have a dipstick or fill tube. It must be filled from the drain plug with a special filling pump and pan adapter.
Using a filling pump, add five quarts of fluid, but don't remove the filler from the pan. Start the car and shift from park to reverse, to drive, and back to park while holding the brakes. Remove the filler and let the fluid drip into a catch pan with the engine running. If no fluid drips out, add another half quart of fluid with the engine still running. The fluid level is set by the fill pipe you just replaced. The fluid is supposed to be 113°F before you're supposed to put the drain plug in, but I usually just feel for a warm pan with the back of my hand. It should take about five minutes before it's ready.
Using a filling pump, add five quarts of fluid, but don't remove the filler from the pan. Start the car and shift from park to reverse, to drive, and back to park while holding the brakes. Remove the filler and let the fluid drip into a catch pan with the engine running. If no fluid drips out, add another half quart of fluid with the engine still running. The fluid level is set by the fill pipe you just replaced. The fluid is supposed to be 113°F before you're supposed to put the drain plug in, but I usually just feel for a warm pan with the back of my hand. It should take about five minutes before it's ready.
i agree with your mech not to touch the TC. if you want to get to that fluid, do a drain/fill, run the engine for a few days, then do another drain/fill. repeat until you're happy. a complete, sudden new fluid change can shock the transmission!
Last edited by timmy0tool; May 23, 2025 at 06:36 PM.
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From: Phoenix
222 S-65
OP there isn’t a drain plug for the torque converter in the seven speed box that I have seen.
I always drained the torque converter with the five speed box. More fresh fluid more better!
Next time I drain the seven speed I will weld a bung to the pan to drain it without removing the (stupid) fluid level plug that requires removing the pan to get to.
I always drained the torque converter with the five speed box. More fresh fluid more better!
Next time I drain the seven speed I will weld a bung to the pan to drain it without removing the (stupid) fluid level plug that requires removing the pan to get to.
Last edited by JohnLane; May 24, 2025 at 09:57 PM.
