Why wont my key turn in the ignition switch, I am unable to start the car. on 2002 Mercedes-Benz S430

It is a 2002 Mercedes S430

Asked by for the 2002 Mercedes-Benz S430
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.