We do them at the B-Service and they usually come out fairly dirty. It only takes a couple minutes to check them, though. With the glove box removed you'll see a rectangular access door held in olace by a white clip. Slide the clip up and remove the door. Both filters ( identical ) can then be removed. Keep in mind that the glove box can be a bit stubborn to remove, especially if it's the first time it's never been done. Also, make sure the access door is correctly re-installed or you'll wind up with a whistling noise at high fan speeds. Good luck