I thought that this was the typical Lock Tumbler issue till I looked into it
https://www.peachparts.com/shopforum/diesel-discussion/333785-steering-colum-lock-ignition-lock-housing-causes-ignition-switch-failure.html

About a year later this happend:
Thread on my issue: https://www.peachparts.com/shopforum/diesel-discussion/387730-another-type-ignition-lock-tumbler-issue-w123-pictures.html?highlight=steering

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84 300D, 82 Volvo 244Gl Diesel