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Anybody have problems with their power tailgate? I was washing the wifes car today, and I had the tailgate open for about 45 min while doing the wheels and detailing it. When I was finished, I go to push the button, and the damn thing doesn't want to close. Sat around for a while and just decided to manually push it down. Pushed the button to open it, and the thing worked fine after that. <IMG NAME="icon" SRC="http://www.vwvortex.com/zeroforum_graphics/screwy.gif" BORDER="0">
 

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Re: Power Tailgate (MERKIN)

I have had some similar quirks with the tailgate (had the car since early May). It hasn't happened often enough to discern a definite cause or pattern. You think the thing is just broken, then soon it starts working normally again.<p>Looking at the mechanism, I'm actually not sure whether the motor is driving a hydraulic piston (the driver side power strut is obviously the lifting unit), or a steel cable driven mechanically by the motor inside the tailgate. There are two jacketed lines connecting the power strut to the tailgate; if it's hydraulic then one probably carries the fluid and the other is a an electrical connection for position sensing, if it's a cable then the two lines are probably for cable in and out.<p>The system has some pretty sensitive interference detection, so if it senses the slightest hint of an obstruction or problem, it will refuse to close. Also, it seems to have some kind of calibration with the tailgate position, and if it gets temporarily confused it might not open all the way etc. If you inadvertently touch the tailgate or "help it" after pushing the button, it will stop and you may have to push it closed manually.<p>After any of these events, the mechanism will recover, but it takes some time - as if an internal calibration sequence is initiated by computer control, but not during or immediately after it acts up. In your case, I wonder if the calibration cycle may have run at some point while the tailgate was open, confusing the computer and "recalibrating" the open position as the correct "closed" position.<p>I mentioned this to the dealer service department, and they played with it some but of course weren't able to cause any misbehavior at the time. I suspect that eventually there will be some kind of service bulletin that may shed more light on the quirks, even if there is no "fix" for it. Hopefully they will go a step further and release a firmware upgrade that is a little more intelligent and recovers more gracefully from error conditions.
 
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