[javadog]

Frank;

It sounds like you are missing a part or two. First, remove the mirror glass by gently prying between the back edge of the glass and the adjustable portion behind it. If you have the original mirrors on the car, they'll be held in place at three points with an expandable body clip that is glued to the glass. If you can pry between this clip and the mirror base, so much the better, as these clips are glued to the back of the mirror and you don't want to break them off. Next, remove the three screws holding the adjustable base to the flag portion of the mirror and remove this part enough to get to the electrical connector behind it. Disconnect the connector halves and set the adjustable portion of the mechanism aside. Make a diagram of which wires go where into the connector half still attached to the car and remove the pins and wires from the connector. This will allow you to pull the wiring through the mirror assembly when you pull the mirror off of the car. Loosen the allen head screw that holds the base of the mirror tight to the car and remove the mirror. At this point, you should be able to see how the two halves go together. Separate them and see what you're missing. You should have what Porsche calls a guide tube, two washers and a spring. The parts are held together by the guide tube, the spring is compressed and supplies the force to push the two parts apart and small ridges on the mating surface of the base to the flag portion create an over-center effect when the mirror flag is rotated. It will be obvious once you get a look at it.

Hope this helps.
Jeff