So I took the S4 to get emissions tested today after a long spirited drive, and while I was waiting in line, I started hearing this intermittent 'groaning' type of noise coming from the back of the car. Approximately every 10-15 seconds, it would make this noise and then stop. After getting home and upon further examination, I traced the noise to a component in the trunk. (Pic is attached.) Even after turning the car off, the intermittent groaning noise continued for about 15 minutes. I didn't have time to remove it and inspect, but I thought maybe the experts could enlighten me. Any thoughts on what's going on in there? Thanks in advance!
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