My '02 C320 3,500 miles has started making ticking noises comming from the center of the dash when ever the I first start up or when the air direction is changed in the Auto Mode. It is lasting for about 30 to 60 seconds. The noise, however is getting longer each time I start up. What the heck is going on here? I'm worred I'll have to give up my car for several weeks while they order the part from who knows where. My guess is the whole dash must be removed and will never fit back properly. Any one had this problem yet?