Is B"9" service just B service?
I have never done a brake fluid replacement myself. It's far too much work to do this manually. The dealers have a machine and it's typically an hours labour which is fair.
https://www.ecstuning.com/b-schwaben.../007237sch01a/
Nelson
https://www.ecstuning.com/b-schwaben.../007237sch01a/
Nelson
. Love these kits, put one on our A4 this summer and really impressed. The A4 stock rotors weren't drilled/slotted...now they are. Think the kit was about $220 shipped.






