boiling or bubbling

  1. B

    water boiling/bubbling sound coming from behind the dash after engine is shut off ???

    I have a '99 W202 with air conditioning. I've been hearing a strange water boiling/bubbling sound coming from behind the dash after engine is shut off. I can hear it, even if the vehicle is parked on an busy street with the engined turned off. It continues for 20 to 30 seconds and then goes...
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