How to check and replace the cabin air filter in an Audi A4?

I recently purchased a used Audi A4 and noticed that the air coming from the vents smells musty. How do I check the cabin air filter and replace it if needed?

To check the cabin air filter, locate the filter housing under the hood of your Audi A4. It is usually a black box with clips or screws. Open the housing and inspect the filter for any signs of dirt or clogging. If it looks dirty, it's time for a replacement.

Replacing the cabin air filter in your Audi A4 is a simple and affordable task that can improve the air quality in your car. Buy a replacement filter from an auto parts store and follow the instructions in your owner's manual to install it properly.

In addition to checking and replacing the cabin air filter, it's also important to clean the air intake vents in your Audi A4. Use a vacuum cleaner with a small attachment to remove any debris or dirt from the vents.