Here's a new one.... I had my key stuck in the drivers door. I have only one key and the remote does not work, so I use the door to lock the car. I used the key to lock the door, turned it to 3 o'clock position, heard the door lock and went to turn the key back to 12 and the key wouldn't return. It would wiggle from 2 to 4 o'clock.
After a look by a lock smith and a tow to the dealer, it was determined that the door lock mech was 'bad'. Of course the dealer never saw this before. Qualty Porsche engineering. It only took 7 days to get the new lock/door mech from Porsche.
So never lock your car... and park so that it is accessable to be towed.