Noob with his first post: Just bought a '96 328is for my oldest daughter and I have noticed that the blower makes a whirring sound just about the entire time it is on. Slightly louder when the ventilation or A/C is on and the car is running. However, the mystery is that even when I shut the car off, the noise continues (faintly) like the blower is still running. Is that what is going on? I had another car years ago that had a similar problem caused by a twig slipping in where the blower motor blades were from the outside intake vent at the bottom of the windshield. But the sound stopped when I shut the car off. Any suggestions on how to get at the blower motor blades in this vehicle to see what might be going on? I also have a '93 Mercedes Benz 190E 2.6 Sportline LE with a blown heater core that I will be replacing soon and that one is a BITCH to get at - almost have to remove the entire dash. The blower motor is behind the heater core. That vehicle also has a faint sound in the dash when the car is shut off until I press the system off button on the temp control.