1).Remove instrument cluster.
2) two large bolt heads will be right in front of you at bottom of instr. cluster dash "hole", securing the steering column. Loosen them substantially, but don't remove them.
3) steering column can drop a little and access to the bolt and nut, holding the clamp, is improved.

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The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)