Hi, my ACE has a rattle on Driver's side only with cross winds while at highway speed. Pushing on the inner slider glass stops it and to be honest it hasn't been annoying enough for me "yet" to do anything about it. I have read though that some folks use 3/8" foam backer rod and stuff it in the appropriate glass channel(s) to silence the beast. You can get it at most any Lowes etc. Not sure of that will work on ACE's, but it's cheap and easy to try.
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