Just for clarity, would you please define what you mean by 'turning over'? Typically when the engine does not 'turn over', what is meant is that the starter won't turn the engine because of an electrical issue or the engine is frozen. On the other hand if the engine does not fire when spun, that is because of fuel, compression, or glow-plug issues. Of course both sets of issues can concurrently exist.

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1961 190Db retired
1968 220D/8 325,000
1983 300D 164,150