How do you unlock a 1992 merecedes Benz 190e steering wheel and ignition switch?

The ignition tumblers on the 1992 190E tend to freeze up from time to time. When this happens the steering column locks as an anti-theft feature. This happened to me and my only course of action was to have the a towing company mechanically force the car into neutral and tow it to the garage. I had to replace the tumbler, which regrettably runs around $1,000 as the steering column and dash must be disassembled to access tumbler housing. * ALSO TRY THIS: Remove the ignition key, put it back in and then turn the wheel strongly left or right while the key is still in the ignition slot. Many models of cars hold the key itself tightly which causes the tumblers to be very tight in the locking mechanism itself. My Mercedes does this and after a few tries (when you think you're going to break the wheel from turning it too hard) the car's ignition/lock tumblers loosen up from the slight prying it gets as you turn the wheel and the problem it fixed. * DO NOT: Turn your front wheels against a curb or other object, it puts pressure on your Power Steering unit which in turn makes the wheel very hard to turn. This in turn also makes the lock/ignition switch tumblers very tight which can cause this same above mentioned problem.