Ah, I understand what you mean now. Mine doesn't have the cross bars, so that's what was confusing me. I found the BMW service bulletin for the rattle fix. I think my problem is that something in the mechanism is actually broken (bits of plastic fell out when I tried to close it). So the velcro fix doesn't help.

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2002 X5 4.6is - Imola Red/Black (Sold)
2001 740i M Sport - Anthrazit Metallic/Black (Sold)
1998 M3/4/5 - Technoviolet/Dove (Sold)
2003 Z4 3.0i Sport - Sterlinggrau Metallic/Black (Sold)
2009 Mini JCW (The Wife's)
2015 i3 REx - Arravani Gray/Tera World (Daily Driver)