I paid Halfords to do mine then had to rewire it myself as they got it wrong by connecting the switched live and constant live wires both to constant live.
This meant the parking mode did not kick in as the unit did not sense power off.
Be aware when testing for switched live these circuits do not power down straight away.
I used the fuse box in the footwell near side not the higher panel, this picture should sort for you.
Thanks I have a service plan but this particular gearbox oil change is not included.
Turns out that a non dealership specialist was slightly more expensive but they included flushing.
Had it done at Audi for convenience of being done at the same time.