Hi all,
I've got a 06 CL9 and have been hearing some bizarre noises recently! It sounds like a high pitched fart/whistle that tapers off at the end. It's a very "airy" sound, like vacuum related.
In fact when I first heard it, I thought it was from the radio station, but the second time it happened the radio wasn't on. It appears to occur in hot conditions and from forward of the driver's seat, most likely the engine bay but not sure.
Most recent occurrence happened at the lights, so that probably rules out engine/brakes? Does not appear to affect performance of the car (as yet)
Any ideas?
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