Annoying high pitched whirring.

[kungfupanda]

I've got a 2008 S320 CDI. Everything is fine with it and it drives really quietly except when I'm turning right for anything over a second. When I do, there is a quiet high pitched squealing coming from the passenger side air vent area. Not very loud but annoying.

The previous owner said it might be a loose part in the air vent motor or something which squeals at a certain angle?

Does anyone have any experience of this?

 

[BlackC55]

Id put money on it being the interior blower bearings causing the noise. Lower the under dash panel and have a look at the motor. They usually squeel if they have got wet.

 

[kungfupanda]

Cheers for that. I should have had a look when I did the pollen filters!