".....the final part where the engine spins fails to happen".

Steve, by the statement, I think the car does not crank (spins).

It could be neutral safety switch, like ferdman stated try to start it in neutral.

Otherwise sounds like the starter is gone south.

My 0.02

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1999 Porsche 996 Carrera Convertible
1994 420E - SOLD
1986 300E - SOLD, what a car
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