Is the starter functional? yes And we have a new battery.

does the starter cycle the engine? no not at all, it tyes but the engine does not turn over.

spark plugs removed)? yes still the engine will not turn over. just a clunck.

I took the srarter off it does work, then I put it back on just a loud clunck. not a clunck like a dead battery, just a loud clunck.

I think the engine is locked up.

I am not at my house I may need to get a large wrench and try to turn it over by hand.

__________________
1976 240D
1976 240D parts car
1970 220D daily driver