When the Steering Colum Lock is out inspect the Ignition switch. In the pic the circled area shows one side of the points is entirely gone.
When you buy an new steering Colum Lock you get a new Ignition Switch and New Vacuum Shutoff Switch along with the colum lock.
The other pic shows the part number for the steering colum lock. I bought it from mercedes but it was made in france.
Steering Colum Lock (Ignition Lock Housing) causes Ignition Switch Failure