The exchange of the actual key was tricky, because the key blank very stuck in the leadership in the new housing. Here I've helped me with a splash of WD40. After a few minutes of exposure to the blank was then drawn from the management and use of the original key. Before changing the key of the retaining pin still needs to be removed and used after the onset of the new key again. With a sharp piece of metal and a small hammer he read easily "beat out" and then reinsert it. - Of course, the hammer should be used with some "feeling". -
Addendum on 15/07/2014
Now, after a little more than half a year with the new key case, can the "ejection mechanism" again slightly. Occasionally snapped the key is not correct in the folded position, and works by itself again.