How do I change the cabin air filter in a 1990 Audi 80?

I've heard that the cabin air filter should be changed regularly to keep the HVAC system working properly, but I'm not sure where it's located in my older Audi 80. How can I access and replace the cabin air filter?

To change the cabin air filter in a 1990 Audi 80, first locate the filter housing under the glove box on the passenger side of the vehicle. Remove the cover and old filter, then install the new filter and replace the cover. You may need to consult the vehicle's manual for specific instructions, as some models may vary.