1992 400E - 217,000 miles - Ignition key would no longer turn; tried all the tricks (lubricant, vibration, etc.). Ordered new tumbler from dealer and had car towed to a locksmith. He has removed the old tumbler and now tells me that the tumbler is not my problem - there is some piece related to the steering wheel/column that is keeping the tumbler from turning. He has not put the new tumbler in, as he says it will exhibit the same problems as before. He does not perform any work past the tumbler and has called me to come get the car.

Any ideas as to the wheel/column issue? I'm a DIY'er most of the time, I'm already into this job for around $250 and I need to try and fix this myself if possible.

Thanks in Advance,
Ray