How to adjust the gear oil in an Audi 80?

I am trying to change the gear oil in my Audi 80, but I am having trouble finding the right procedure. Can someone guide me through the process step by step?

First, make sure the car is on level ground and the engine is turned off. Then remove the drain plug and let the old gear oil drain out completely. Once drained, replace the drain plug and refill the gearbox with the recommended gear oil. Don't overfill!

You never want to mix different types or brands of gear oil. This can cause damage to your transmission. Always stick to the recommended gear oil for your Audi 80.

Don't forget to check for leaks after refilling the gearbox. If you notice any leaks, fix them immediately to avoid further damage.