MK V Jetta, trunk latch prob

Sometimes wont open from remote or release switch. Will occasionally get trunk open warning. Almost every time w/warning, trunk will pop open when driving.
Looking inside w/rear seatback down, trunk light is "on".
Close easy, or firmly, no difference. More frequent when cold. Today, trunk wouldn't latch. Several tries, then held closed, mile later, trunk open warning, then lid popped open.
????
thanks
gary
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latch

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Clean, lube, repair, replace? or?
thanks

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when doing latches due to safety I only like to replace them.

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Doors, I agree. Trunk, I don't see it as a major safety issue.
As this problem only occurs when the latch is cold, and I've had a "Trunk open" warning and as the latch warmed up, it disapeared, I suspect sticky lube.
How much of a process to reach and remove latch?
thanks
gary

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Any luck getting this resolved? I have a 2007 Jetta and the trunk will not close when it is cold - exact same symptoms and problem as you explained; here's my details:
Today, the temperature was 42 F and the latch malfunctioned. I shut the trunk and it opened immeadiately. Sometimes applying pressure or weight works and the trunk closes, not this time. Sometimes fiddling with the small, round rubber bumpers on the left and right of the latch does the trick, not this time.
So, I took my hands and rubbed them vigorously back and forth on the plastic trunk latch mechanism until it felt warm between my hands. I then closed the trunk gently and it shut...at least I could not pull it open with my hands. When I started my car, the trunk warning light was on and I could not open it via the remote of trunk button on the door. The only way to open the trunk was by folding the seats down and hitting the child-safety release. The trunk was tightly shut, but was not locked according the the computer/sensor that monitors the trunk latch.
So, with the trunk "shut," I started to drive. A few minutes later, the trunk popped open. I tried to shut it again, and again it stayed down, but the warning light was still on. This time I tied the trunk shut with a bungie-cord and went on my way. An hour later, I pulled over to check the trunk, and it was open again...I 'shut' the trunk again - by then it was 45 F, still would not shut properly. I continued on. Finally, at 47 F (according to my dash temperature gauge) I was able to get the trunk to properly close.
Seems like temperatures near or below 50 F cause trouble for the Jetta's trunk latching mechanism.
I took my car to the dealer ( still under warranty) and told them to fix the trunk. They could not reproduce the problem the day I dropped my car off, so it looked like the trunk was perfectly fine. Turns out, it was not fine. It was near 70 F that day, and the trunk works perfectly well when it is warm. SO, I am off to the dealer again, making sure it is COLD when I pull in to the dealer lot so that the mechanic can see the problem in action.
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Will try this, and see if it works on mine.
http://forums.tdiclub.com/showthread.php?t#4382

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