2000 Mercury Cougar electrical system problems

The car would stall without warning one time leaving me in the middle of a busy intersection. This time on a slight hill I sat stalled with hazard lights & headlights on but got rear ended by a motorist traveling 50 MPH. Had problem looked at & thought it was repaired but happened again. Car is now totaled. Air bag did not deploy and gas shut off valve didn't work because much later at tow yard car was started. It could of been my death! 6 days in hospital & no car.

I have a 2000 mercury cougar that I bought brand new and has been service faithfully by a dealership. But recently in the past 2 months there have been 3 alternators put on my car all resulting from the same problem. The console lights flicker and dim, the headlights flicker and dim, the battery light flashes and eventually it stays lighted and the gauges zero out and the car shuts down starting with the radio and eventually the light goes out and the car dies.