Well, on the one hand, if it never does that again then no... but if it does, then yes...

The only clue I get is the one hour. It suggests possibly a "hot soak" problem. Was the car fully warmed up when you parked it (half hour drive or more)? What was the outside temp? Some parts susceptible to hot soak in general are Crank Position Sensors and Coils. But it could be something else. Did you do a search?

This thread might pertain:

E240 stalling problem - engine temperature sensor?

__________________
1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra