What is the procedure to remove the key ??

Pretty confusing system - the audi key.

With the Volvo XC70 you placed the key into the slot and it pulled it in.. and you then pressed the starter button. The engine would then start and stop with this button, to remove the key you just pressed it.

With the Audi key, pushing the key into the slot actually starts the engine if you have your foot on the clutch. To stop the engine, press the key again. However often the key can't be removed?? it is just stuck in there. If you press again without the clutch depressed it puts the car in ignition mode, if you press again with the clutch in - the car starts again. You continue this cycle until eventually the car releases the key.

I may be forced to read the manual !