Final answer:
To fight a fire in your vehicle, use a fire extinguisher and then call for professional help, ensuring you are a safe distance away until they arrive.
Step-by-step explanation:
When attempting to fight a fire in your vehicle, the safest and most effective option is to use a fire extinguisher designed for vehicular fires. In the case of a vehicle fire, you should not use water, as it can spread the fire if it's an electrical or oil fire. Ignoring the fire and simply exiting the vehicle could put you and others at greater risk if the fire escalates. Calling for professional help is also essential. You should ensure you are safely away from the vehicle and await assistance from fire control professionals.