My sunroof will go into vent postion but will not retract anyone had this problem or know how much it will cost to get fixed

press the button to open and help the sunroof by pushing the down on the glass from outside chances are its sticking round the rear edges

You totally should have looked into this problem before you bought the car.

If the motor is making noise, try to help it manually. Then grease the rails with white lithium grease.

Spray the switch with RadioShack Contact Cleaner.

Sometimes my sunroof doesn't open/close with the first twist of the switch. I don't think it's a sunroof problem,I think it's electrical since Audi's (my car is no exception) have poor electrical systems. But my roof has never gotten stuck. Just a couple or 3 turns and the roof cooperates.

Notorious B6 problem and if your car isn't under warranty, there is a DIY fix posted at other audi forums; I won't mention their names, but a quick google search for "Audi forum" should bring up the major players.
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if you can’t be helpful the just pass on by. Jerk.