Every days a school day
All of what Beddie has said is correct. I always take mine to VW for brake fluid change.
The OEM stuff is great unless you are doing a lot of track day where your brakes it be getting super hot.
Beddie - do you use 5.1 as you track a lot?
In my old ed30 I always ran Motul RBF600 which is a DOT4 fluid, reasonably cheap and has a dry/wet boiling point higher than quite a few DOT 5.1 fluids, probably had 3 full fluid changes using that and couldn't fault it tbh, since though I have always ran OE fluid changed by the dealer and stuck to once a year or after every 2 track days and it's been spot on tbh

For the cost of RBF600 alone I can have the OE fluid supplied fitted and bled and fresh fluid seems to make the most difference in feel terms imo