I have a Jetta 2006 that has an exhaust leak around the shaft of the waste gate. I believe that is the waste gate which is below the exhaust manifold with a pipe that runs up to the exhaust manifold. There is black soot from the leaking exhaust gases around the area. It also makes a hissing sound that you can hear easily. The waste gate is controlled by I believe by pressure connected to a diaphragm. The leak is around the shaft where the diaphragm (pressure unit) is connected by a rod. I have a Bently service manual but it is very weak on the turbo service. Where can I find parts? Is my description correct on naming the parts?