The arms for the sunroof wind deflector may break; if the broken pieces are not removed, they can jam the sunroof.Google+
Car Problem Reports
Mercedes-Benz ML430 Arms for Sunroof Wind Deflector May Break
Mercedes-Benz ML430 Problem
Average Mileage: 92,304 mi (40,000 mi - 141,327 mi)
Visitor, 2001 Mercedes-Benz ML430, 94,325 mi
sunroof opens and refuses to close, gets teasingly close....grrrrr I own a repair garage and do not want to deal with the issues this car has. I would rather drive an 88 honda
Visitor, 1999 Mercedes-Benz ML430, 131,000 mi
Loud crunching sound wheb last opened. Not yet fixed
broken lift arm for wind protector
Visitor, 2000 Mercedes-Benz ML430, 60,000 mi
Sunroof plastic cover stuck. Do not use sunroof.
sun roof opens, say half way. You hit the button to close it, but it opens all the way. have had to play with it up to 2 hours, getting someone to pull while other jogs switch.
Visitor, 2001 Mercedes-Benz ML430, 105,000 mi
Sunroof would open, but not close due to deflector arms not operating correctly. Removed deflector and arms. Sunroof now works.