I have a popping sound now because they took mine apart to fix rattles and buzzing sounds. It's better now but I'm going to take it back for the rattles again and the new popping sounds I'm getting. So far, I'm not impressed at all with the interior build quality of the car. I even hear intermittant rattles coming from my left door. I believe it's actually the window as I can press on it to make the rattling sound disappear. The problem with this rattling sound is getting the dealer to hear it as they usually only drive around the block. I need to get these guys into the car and drive around my area where the streets are not as good.
I guess I should have kept my cheaper car which didn't have the rattling sounds at all. These things just drive me up the wall for some reason. I do admit that I'm anal about these sounds.
What's worse is that I even hear sounds coming from the rear of the car as I drive up the driveway (squeeking sound) and also when I back in/out of a parking spot and have to turn my steering wheel quite a bit(clicking sound).