Problem: strange smell in the car
Fix: Check to see if the smell comes from air ventilation. If that’s the case, you need to change the air filter in your Audi A4.
Learn how to replace the Cabin Microfilter Fresh Air Filter on Audi A4 2002 – 2008. Follow the steps in the video and you’ll be good to go. As you can see, it’s not that hard, and the air filter is not that expensive. Check Amazon for prices.