I'm not sure I understand. Was there ever anything other than a 617 in a 300TD?

Its definitely a euro car, with a turbo badge and a turbo engine. I always thought that meant 617.952, and that the only difference between a euro and US engine was the absence of some emmisions control stuff.

I assume that the instument cluster must have been swapped out when it was imported to the US since its in miles not kilometers. It seems most likely that the whole cluster was replaced with a pre-83 unit without the tach.