Electrical problems with trunk gas door and ac

Trunk won open even with manual release http://newbeetle.org/forums/new-beetle-convertible/54170-trunk-wont-open-even-manual-release.html there is good info here C24OF

Sounds like the battery in the remote. Try your other remote.

Other Volkswagons have the release in the trunk or in the cargo area of the car, behind a small access panel or door. Sometimes this is part of the trunk liner and you have to pull it away from the edge....

I can't promise it, but in my 99 A4 there is a release cable in the trunk. I have to pull the trunk carpeting away on the side where the gas filler door is, and there's a red cable there that can be used as a manual release. I imagine your TT has one as well - look in the hatch on the side with the gas door, and pull the lining back - you'll probably have a release cable as well.

The quick solution until you get it fixed is use the emergency fuel door release in the trunk through the circle access hole. You must pull the cable down not towards you. and you must use much more force than you would expect.

The actual problem can be any one of these...
cable, solenoid, actuator, switch, cable plugged into switch.

I was looking for a solution but found none.  Here is what happened.  I opened my trunk and wound up pulling on a little red plug that will open the trunk.  The red plug pulled loose in my hand.  The cord on the red plug snapped in half.  What I did not know was that there was a small plastic clip that had pulled loose.  The clip connected the various releases (remote, door switch, and inside the trunk handle) to the actual latch.  

Here is what I did.  First I removed the back seat and the frame to the hole that goes back to the trunk (this is a convertible).  The bottom of the seat pulled up and had a rod connected to the car.  I pulled the rod out of the hole and slipped the other side off.  Next I removed the head rests off (they popped up and off).  I used an hex wrench (I think 8mm).  There were three bolts on the bottom of the seat back.  The seat back then comes out.  The frame has 4 or 5 more hex bolts.  Now the hard part.  I was able to reach in and remove a screw under the handle release.  Then I pulled out the plastic inside cover to the trunk, enough to reach a small rod that extended up from the trunk latch.  This released the trunk, allowing me to repair everything.  I replaced the plastic plug cord with a metal cable (this time wrapped around the metal arm of the trunk release).  I put the little plastic connector back on (it did not break, just popped loose).  Now everything works great again.  
Good luck!

Its not in the trunk,Its either in the glove box or on the floor left side of drivers seat

There is a slow drian being placed on the battery from one of the VW accessories installed on your bug. I had a very similar problem with my daughter's 1998 Beetle, and the cause was traced back to the hood latch. There's an electrical connection to the hood latch, and when the connection fails it places a slow drain on the battery. Although I'm not fully certain, I beleive the connection is part of the circuit that allows the security system to sense that the doors, hood and trunk are all closed.

I also had a problem with the electrical trunk release actuator, and had to have it replaced once. The remote key fob signals a the electrical actuator to open the trunk lid when the trunk release button on the key fob is pushed. If your trunk release operated normally, you probably do not have an electrical problem by your trunk.

About 60 percent certain you problem is located in your hood release circuit. An experience car nechanic should be able to test this circuit using a hand held electrical meter before it is removed and replaced.

Good luck. My daughter's bug has been acting normally ever since the latch was replaced about 2-3 years ago.

try spraying some lubricant on the latches.

There should be an emergency bypass cable in the trunk to open the gas door.