My vents are a bit noisy, but not to loud, do your vents make any squeeky or strange noises. I dont mind my vents being noisy on setting 4 because at least i know they are working and doing there job :idea: .
A few months ago when i was in York, there was a strange fluttering from the front vent under the winderscreen that was driving me nuts. It took about 5 minutes and it really bugged me, so i though how am i going to sort this out. So i put the vent setting on 4 and guess what, out flew a receipt for some petrol that the previous owner must have got (because all my receipts go in my wallet)