Put the WD40 can away. Take your chassis # and registration to your nearest dealer and order a coded tumbler as soon as possible. If you put this off or listen to somebody's snake oil remedy, you will pay dearly. What you are dealing with is a chronic problem since MB lost the formula for good quality ignition locks. Anybody driving a 1960's 220Sb more than likely has the original ignition lock.

Good luck,
Peter

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