Where is the blower motor resistor located on a 2003 Audi A6 Quattro?

What is your question?

I've had the car inspected by 2 different mechanics and both said that the blower resistor was the issue to my ac not working. They both want to charge me $275 to fix it but I found the same part on Amazon for $20. I wanted to see if this is something I can do on my own?

What makes this problem better or worse?

NA

How long has your 2003 Audi A6 Quattro had this problem?

1 week