MTF and ATF done. Finished with clutch adaptation with VCDS.
For future reference for anyone with an S5.
The RS5 has a cutout on the cross-brace that allows to easily take off the MTF drain plug that doubles as a temp sen as seen below.
The S5 doesn't have that cutout on its cross-brace as shown below
It's super tight and a ratchet+socket doesn't fit, impossible to remove the MTF drain plug that way.
I had to use an insert bit that's attached to a wrench. Even so, with the insert bit inserted into the wrench, I still couldn't fit my wrench as there was still not enough space to squeeze my wrench in between the bolt and the top of the cross brace.
The trick was to slide in the insert bit by itself (not attached to the wrench) with my hand then use the open end side of the wrench to grab the insert bit and crack it open. It was really tricky but glad I didn't have to take off the whole cross-brace
Now for the ATF, a warning just in case, when I removed the old internal filter, the seal that is normally on the top of the filter nozzle remained stuck in the hole inside the transmission. Make sure to remove it before installing the new filter.
Also note, when I got the ATF serviced at 30k by a shop (back then I thought a DSG service was out of my reach), they replaced the internal filter with a cheap Vaico! Also, the shop didn't install the seal that goes onto the indexing pin on top of the filter. This is why I hate taking my car to the shop, you never know if the job is correctly done. I'm so glad I've done it myself this time around.
And finally, here how the different oils look like side by side. MTF is the darkest, even darker than the ATF, I don't understand why Audi doesn't service the MTF! Rear diff oil looks like new but it's so easy to service and it's only 1L so I'm happy to change the oil each time I service the transmission.
Super happy and satisfied that I was able to do it by myself. I can now fully service my car without needing to take it to the shop. I've always been intimidated by transmission jobs for some reason and never took the plunge but Ape Factory's detailed "how-to" gave me the confidence to do it.
Test drove the car and no issue. Now I'm gonna rest I'm dead.
Cheers
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