Ignition Key will not turn! Help!!!!

93 500 SEL I used one of the old standard keys that had not been used for a long time. After starting the car about five or six times it would no longer turn
the ignition switch. So I went and got the newer flip key and now it will not turn the switch either! Never had a problem with it before. Seems that if the tumblers were worn out I would have had some trouble turning it in the past. Any ideas? Cost if it is the Switch? Help
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Are your front wheels in a bind.....try taking the stress out of your steering wheel by turning it and then try the key again. I doubt that this is your problem, but it did happen to me......the key would not turn because I had the front wheels in a bind.
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Yep I tried the steering wheel, no luck. I even tried to rock the car back and forth. Just hoping someone on here might have had something like this before I let the techs get hold of it tomorrow.
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If you managed to jiggle and turn the ignition to on position... do not shut it off... run to the dealer and have them swap it out temporarily until you get a new tumbler.
Try spraying some graphite lubricant and jiggle with no tension from steering wheel.
If no luck at all, $400 is what you are going to pay... plus tow truck.
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