Whistling fan

[llotse]

Just taken delivery of my W210 E320 CDI estate (pics to follow), amazing car but one thing is annoying me already! It has a whistling climate fan and the tune is not good. Its not loud but just annoying. Any ideas as to how to make it quiet? Is it easy to get at? I will ask the dealer to fix it but it would be nice to be forearmed with the right info.

 

[Dieselman]

The fan is easy to get to, it's under the passenger dash, accessible from underneath once the lower panel is removed.

 

[llotse]

Many thanks Dieselman much appreciated, off to the dealer Monday with the necessary info!

 

[llotse]

Had a quick look at this myself today and found that one of the retaining clips for the air filter was missing allowing air in and causing the noise. Fixed now.