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Discussion Starter · #1 ·
We have an 06 plate Cmax, and when the engine is off we occasionally get some very loud and strange noises (about once a month). They appear to come from the speakers, particularly the rear speakers, and sounds like a very large burst of static! - when it happens we can hear it from in the house, and it can sound like a firework display going off!

Any clues what it could be? Anyone else had this problem?
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