Mercedes Benz repair: My car just stop, fuel gauge, light year

Question
What part would I need if my car just stop running while sitting at a stop light?


Answer
Year, make, model, miles on vehicle.
More data needed:
#1. It seized = crunched, squawked, jumped?
#2. Blasted smoke from under hood, what color?
#3. Exactly as if key was turned off?
#4. No power, lights or cranking since?
#5. Cranks but no start.
#6. Starts but dies.
#7. Any issues in the last month?
#8. What service has been done in the last year?
#9. How old is the battery?
#10. Add several gallons of fuel and try to start it, to prove the fuel gauge has not failed = false reading.
#11. Generic geographic location needed.