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      01-10-2017, 02:21 PM   #65
SoCalRob
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Drives: 2019 X3 M40i
Join Date: Nov 2014
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Quote:
Originally Posted by bobsor View Post
The issue is not that the windows are frameless, it's that the windows drop down when the doors are opened so they're unsupported laterally when the door is closed, hence the movement and rattle. My Chrysler Crossfire had frameless windows that didn't drop on opening, and after seven years the doors closed like bank vaults, unlike my M2. I've never had another car with windows that drop so I don't know if it's poor implementation or a design characteristic.
Not sure I'm getting your point. Why would the fact that the windows dip down a fraction of an inch on opening mean that they were any less supported laterally?

BTW, I always assumed they dipped to facilitate opening/closing the door (i.e., by breaking the air lock). -scr
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