engine does not turn

[sam]

I have a 1990 500sl with approx. 50,000 miles. The car runs really great . I went on a 5 hour drive, and parked it for almost 1 hour and when I tried to start it, the engine would not turn. There is ignition , but the engine will not turn. it has been at the dealer for 2 days now, and they tell me that there is no reason, that this car should not start, but it won't.any ideas guys. thank you.

[bwheitman]

Maybe the ignition switch? I don't think that model had the starter lock out on the alarm, but worth checking. The ignition swithes in those cars go bad after awhile. Have they tried kicking the starter manually? It could also be the starter itself. The dealer can jump the silenoid to determine if the starter is bad, then once that is determined they should check the circuit from the ignition switch. Good luck!
Brian