The Sunroof May Jam or Not Close Correctly on Mercedes-Benz ML350

Arms for the sunroof wind deflector break; if the broken pieces are not removed, they can jam the sunroof. 

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Average mileage: 118,743 (80,000–159,000)
3 model years affected: 2003, 2004, 2005
8 people reported this problem
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problem details
2004 Mercedes-Benz ML350 sunroof made a cracking sound when we opened it, now the inside shutter hangs up when opening or closing and the sunroof will open to the vent position but it will not slide back, it will try to slide back but it seems like its is hanging up on something that I cannot see, Please advise Thanks.
2004 Mercedes-Benz ML350 159,000 mi,
The small arm that appears to raise the wind deflector on the sunroof is broken or unattached. It may be jamming the open and close operation.
2005 Mercedes-Benz ML350 155,000 mi,
When attempting to close the sunroof, the deflector arms snapped and broke