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air con noise

657 Views 0 Replies 1 Participant Last post by  AmoS500
Hi,
There is a sound like (sucking air through a straw) coming virtually constantly through the centre vents. If I turn off the air con, it stops.
Does my air con need re-gasing?
Seems to be heard more at lower speeds.
Car is five years old, with 102k miles.

Thanks

Amo
W140 S280 1998
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