Strange Noise Under Dash - Speed Related

[rb905678]

Good Day All,
I have an 03 MCS that has developed a speed related noise under the passenger side dash. With the windows up, Air con off and sunroof closed you can hear a noise from 60Kph up - the faster you go the more annoying it gets. It sounds like the "wind" is making something gurgle/vibrate? I have checked the external windhshield vents and boxes - nohting - the sound seems to be coming from the inside the car but a ways up under the dash.

Anybody out there have any ideas? Experience the same thing?

Any help would be greatly appreciated as it is driving me nuts - could keep it below 60Kph

Thank you in advance.

Cheers,

[tmevo6]

I am having such problem too

[zoooooom]

I had this poblem after the car was serviced,There is a filter for the heater under the dash at the passengers side and the cover was not located properly