In a long tunnel, a vehicle ahead catches fire and traffic stops; your car cannot move forward any more. What is the most appropriate action?

1. ①Pull over to the edge, turn off the engine, leave the key in the car, evacuate through an emergency exit or similar, and report via the emergency phone or 119
2. ②Close the windows so smoke cannot get in and wait inside the car until the fire is out
3. ③Turn the car around or reverse to get out through the tunnel entrance
4. ④Lock the car, take the key, and walk out in the direction the smoke is spreading