2009 Avant sunroof closes, then opens
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Audiworld Junior Member
Joined: Apr 2008
Posts: 42
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From: Madison, Wisconsin
2009 Avant sunroof closes, then opens
I've had this problem intermittently with my 2009 Avant. I turn the switch to close the sunroof. The roof closes, only to open back up again (a few inches) as soon as it contacts the front "closed" point. Sometimes I can get it to close completely by doing this 3,4,5 times. Sometime I can close it by pulling the "down" switch and holding it. And sometimes it just closes with no problem. It's pretty strange behavior, and I remember seeing it pretty soon after I got the car. I haven't thought of asking about it when it's been at the dealer's, although I might have to do that the next time I bring it in. Has anyone else seen this, or have a suggestion as to why it's happening? It almost seems as if there's some sensor that detects something near the close point and sends the roof back open.
Thread Starter
Audiworld Junior Member
Joined: Apr 2008
Posts: 42
Likes: 0
From: Madison, Wisconsin
Thread Starter
Audiworld Junior Member
Joined: Apr 2008
Posts: 42
Likes: 0
From: Madison, Wisconsin
AudiWorld Senior Member
Joined: Mar 2009
Posts: 747
Likes: 5
My car suffered from this problem exactly as you describe. It required a triple play. The motor supplied was replaced along with the switch (twice) and the software was updated. The sliding surfaces need periodic cleaning and lubrication. There is a special lube for this. The sunroof also has water drains that need a snaking from time to time.
The motor current would change with the ambient temperature. When parked in the sun on a hot day my Deep Sea Blue car would heat the motor to a point that it would falsely sense an obstruction at full closed and snap back open.
The switch had the tactile feedback usually associated with a Russian tank. The second switch had a similar stiff unpleasant feel, but the first time I moved it to pop up the rear of the glass the **** and shaft came off in my hand. The third switch finally had the feel Germans expect in luxury cars.
The motor current would change with the ambient temperature. When parked in the sun on a hot day my Deep Sea Blue car would heat the motor to a point that it would falsely sense an obstruction at full closed and snap back open.
The switch had the tactile feedback usually associated with a Russian tank. The second switch had a similar stiff unpleasant feel, but the first time I moved it to pop up the rear of the glass the **** and shaft came off in my hand. The third switch finally had the feel Germans expect in luxury cars.
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AudiWorld Senior Member
Joined: Mar 2009
Posts: 747
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Yes. It is VW G-000-450-02. It comes in a 85g tube, and can be had at ESC tuning for about $25.
That is cheap. Mercedes need two products, a special sliding compound, and a lubricating paste. Together they cost $115.
That is cheap. Mercedes need two products, a special sliding compound, and a lubricating paste. Together they cost $115.
Last edited by Moviela; May 17, 2012 at 05:59 PM.
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