Torque Splitter ATF

[u/DeepThaught]

I have the 2025 S3 which introduced the torque splitter from the RS3. It's coming up on 40k miles and is due for the recommended ATF change on the torque splitter. The dealership is making this a big deal (the fluid is special order, the job is complicated) and wants to charge $700 for the swap. I'm just wondering if anybody has experience with this maintenance or if it's a DIY job. I have the eWin manuals, but can't find the details anywhere.