You've checked the battery, I take it?

Not sure what a Aerodeck is here in the US, but on most cars when this
happens, it often is the starter.
It has a large relay on top of it that engages the starter to the
flywheel. If this relay is not doing its job, you'll hear the starter
turn (actually won't sound at all like a car starting, but more like an
electromotor spinning at high speed) but the car won't start.

Often when cars spin a lot faster than normal, the timing belt is
having issues. I can't imagine that this is your problem, because you
can start it eventually: Once the timing belt breaks or skips, your
car's timing would be incorrect and starting would be impossible.

Remco