This fortunately didn't happen on my S3, but on my girlfirends Peugeot 207, I hope that moderators would not mind this, because it's kind of an universal subject and it could happen on any Audi also.. I opened the cabin filter housing that is placed under the bonnet beneath the windshield, and removed the cabin filter, the spray came with a 35-40cm long extention hose so that it can reach really far, in this case too far. Since I don't have experience with Peugeot's, I turned the car on, the A/C, and I started to spray the contents into the cabin filter housing, I put this long hose all the way in, and all of a sudden, I must have hit a fan, and it sucked the extention hose off the spray and pulled it in, in a milisecond. I heard some whining noises from the fans, I immediately turned them off, again gently turned them on, then off again, and on a couple of times, and the noise disappeared. Everything works fine, the AC, the inner air openings are fine, cold air coming normally. But this hose traped inside is bothering me, and I think that half a car should be dismantled to reach it. I cold my mechanic immediately and he said to leave it be, and even in a case that it was trapped around a fan, that it couldn't for etc. start a fire, that it would burn a fuse first, and not to worry. How do I take it out so that her father doesn't kill me?