Yes, Diesel911 - these threads? Actually, this first one has helpful pictures.

http://www.peachparts.com/shopforum/diesel-discussion/341580-tumbler-problem-key-broke;-turns-freely.html

ignition tumbler removeal

But is your 84 300D the same as my 79 240D? Mine is a W123.

Should I be searching steering column lock? Key turns freely, only no connection seems to be going on.




Also found these videos to be helpful:

http://www.youtube.com/watch?v=H2kAIA2-sZ8

http://www.youtube.com/watch?v=V5FQEkCflMc