I have taken the car to several auto technicians and they keep telling me
there is nothing wrong with my car.

The problem - sometimes the car will not start, when it does it runs great.
The scenario is I will get in the car, put key in the ignition, wait for the
glow plug light to go out and then when I try to start it NOTHING.  Does not
turn over.   Next time - minutes, hours or days later, it starts, then it
won't start and stays in this mode sometimes a few days, then it decides to
start again.   I have it towed in when it doesn't start but then when the
technician tries to start it. the darn vehicle starts.   I drive it home, it
runs fine for a few days then, it won't start again.   Sometimes I try for 10-
15 mintues to start it with no luck, other times it might start on the 3rd or
4th try.

My question, does anyone have any ideas that I could tell my technician what
to look for or what the problem might be.  

Thank you!