How to replace a worn out timing belt on an Audi 80?

I recently noticed that my Audi 80's timing belt is showing signs of wear and tear. I want to replace it myself, but I'm not sure where to start. Can anyone provide some guidance?

Firstly, gather all the necessary tools and replacement parts. Then, refer to the Audi 80's manual for specific instructions on how to access and replace the timing belt. It's also recommended to have a second person assist you during the process to ensure everything is done correctly.