Can someone quickly send me instructions how to
- check transmission fluid level?
- add trans fluid?

I installed used trans, not sure what fluid is in. I don't want to drain completely (read on forums that I also loose 'good' parts when draining), may drop the pan and change filter (after first test drives) as a compromise.

I plan to use a readily available trans fluid (Mobile ATV synthetic), not the Audi special (seems to be the consent that Mobile ATV (Amsoil mentioned also often, but less readily available) works fine.