It is a 2002 Mercedes S430
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2002 Mercedes-Benz S430 Question: Why wont my key turn in the ignition switch, I am unable to start the car.
Answer #1patrick mannion from Greg Solow's Engine Room, November 12, 2011, 17:39Master
Sounds like a mechanical failure of the ignition switch. Are you sure the steering "lock" is not applied, try turning the steering wheel side to side as you rotate the key, perhaps try lock ease or lock lubricant.