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MCT transmission fluid change - 5L or 9L of fluid?
Does the MCT transmission have a torque converter drain bolt on the bell housing or not? I'm aware that it does not have a torque converter, but perhaps the drain bolt is still there and the "full service" still involves draining fluid from that bolt.
I spent a day researching this and I still don't have a concrete answer, so I apologize if there's an obvious place where this is answered. I also know that I can try to look for it myself under the car, but I won't be able to lift it and inspect until I actually get to do the fluid change.
I did mine last January (2012 C63 Sedan) and I did not find the converter drain plug although spent close to an hour turning the crank looking for it . I used 6 litters on total.
2012 C63;1971 280SE 3.5(Sold);2023 EQS 450 SUV 4 Matic (Wife's)
I did mine a year ago (2012 C63 sedan) and drained 4.5 liters and refilled with the same approximate amount although I put 5 back in and the excess drained out. Make sure your pump can pump all 5 liters in and not leave much in the container. There is no drain for the wet clutch on the MCT. Won't hurt to have an extra liter of trans fluid or local access to get one if you find you need it.
I reached out to FCP Euro about the 5L vs 9L kits and they said I could still do the 9L if I chose to do so. Either they're not familiar with the MCT or we're all missing something. Anyone else know something about this?
I reached out to FCP Euro about the 5L vs 9L kits and they said I could still do the 9L if I chose to do so. Either they're not familiar with the MCT or we're all missing something. Anyone else know something about this?
I followed up with them and after looking into the matter further they confirmed that indeed on the MCT you cannot drain the wet clutch.
Does the MCT transmission have a torque converter drain bolt on the bell housing or not? I'm aware that it does not have a torque converter, but perhaps the drain bolt is still there and the "full service" still involves draining fluid from that bolt.
I spent a day researching this and I still don't have a concrete answer, so I apologize if there's an obvious place where this is answered. I also know that I can try to look for it myself under the car, but I won't be able to lift it and inspect until I actually get to do the fluid change.
MCT with wet clutch
~5L for a trans service with a stock trans pan
~7.5L with weistec pan
The link you posted for the 9L kit shows torque converter drain plug in the kit parts list so that kit would not be for a wet clutch MCT. The fluid bottles don't look like the blue fluid the wet clutch mct trans takes. I think they just listed some of the wrong cars under their 'fits these cars' list.
the 5 L link you shared shows fluid bottles like what I got,, and if you click on the fluid link in their description it says 'blue'
Last edited by Dr.Speedfellow; 11-12-2021 at 02:14 PM.
03-01-2019, 02:31 PM
. I used 6 litters on total.
