How do I change the coolant in an Audi 80?

I am planning to do a coolant flush on my Audi 80, what are the necessary steps and precautions I should take?

Start by gathering all the necessary tools and supplies such as a coolant drain pan, coolant fluid, funnel, and safety glasses.

Then, locate the coolant drain valve on the radiator and place the drain pan underneath it to catch the old coolant.

Next, remove the radiator cap and open the drain valve to drain the old coolant. Make sure to properly dispose of the old fluid.