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      05-18-2009, 12:39 PM   #13
Matty C
First Lieutenant
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Germany
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Drives: 2007 Z4 M Roadster, 2006 M3
Join Date: May 2009
Location: Bodensee

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I've used them. I think it finishes off the top when it is down. I also believe that they should have come standard on all Z4 Roadsters. The knobs do have a tendency to be weak and I've had one break. Fit is good and they stay in place when driving at speeds over 100 mph.
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