I found a leak in my ac system. Under one of the two connections going into the dryer/receiver is a 7/16" hex head plug with some small hole in the middle of it. This small hole has what appears to be a silver wire partially coming out. What is the purpose of this plug having a hole in it? The leak was easy to spot because the oil around the hole was bubbling as the refrigerant leaked out. For those interested in looking the dryer/receiver can be found to the right of the radiator. You have to look through the front bumper to see it.
http://germanautoparts.com/images/parts/176820191.jpg Chad 90 Jetta 16v
