I have an R350 2006 that has an engine fan (AC) that sounds like an airplane taking off. I have to turn my AC off if I pull into someone's driveway and roll down my window to talk to them, drive thru windows, etc... People can hear me coming down the street, the thing is so loud. Has ANYone else had this issue? My dealer assures me that it's okay and that's just the way it is but not all R350s are like this, I know. Any advice? It's actually embarassing -- people do turn to look (and not in a good way).