If I do not understand ... you have two problems:
does not turn the key ... or does the engine turn when you give the key?
If the key does not turn ... Try another key or changing the two piles of the key. The authorization of the key works by infrared and requires that the key has batteries and the car has battery. In addition to the key, the EZS unit is also common, which replaces what the rest of the mortals let's come with Clausor (the slot where the key is put). If so you must go to the official workshop.
The second most normal problem would be that you had the defective cylinder head ... disassembled and send to check and repair if possible.
Another story would be that when the key turns the engine does not turn ... it could be that a piston is full of antifreeze and that is why I do not let the engine turn ... release the spark plugs and give the key to the water comes out ...
I hope to be helpful and encourage!
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