Just back from dealer: "couldn't duplicate" of course. Really weird problem with x5 yesterday. Car was parked, when I unlocked and opened door there were loud popping sounds (just like popcorn) and a loud "whish" sounding like air in area of driver's front air vents. There was only a slight amount of air coming out of the vents. I tried turning off/on all air settings, heater, etc. I didn't smell anything hot or burning. Checked to make sure delayed ventilation wasn't on. Started car, noise then got even louder. Sound was so loud (over bluetooth) I couldn't hear my husband on iphone. Drove about a mile and then stopped car completely. Sounds still continued. As soon as I called dealer, the sounds stopped! The sounds had lasted about 20 minutes. Today dealer checked all electrical systems, opened and closed front door a number of times, drove it and couldn't duplicate the symptoms. of course.

Anyone ever heard of this problem? Thanks.