try applying the parking brake when its in park this works for some vehicles
If you are parked with the motor running, engage the parking/emergency brake. Turn the ignition off and restart the engine. The daytime running lights should not be on.
I believe you are "standing", not parked.
If your car is running when parked then it is burning gas. Cars use gasoline to run the engine.
depending on your vehicle, it could be the engine timing. when the vehicle is parked and running open the hood and look at the motor, if its shaking alot, its usually timing.
Exhaust fumes may enter and that is not good.
i'd have to say the person who left the car running. if they didnt leave it running they could have prevented the thief from smashing it into your car.
Where is the leak from? The fuel filler? The fuel tank? A fuel line? Does the leak occur only when the engine is running? Does the leak only occur when the vehicle is parked on an inclined surface?
You don't unless you are parked with the engine running. If you are parked and you want the engine running but don't want the daytime running lights on just shut the car off and set the parking brake then start the car back up. The lights should remain off until you release the parking brake.
Diesels are kept running while parked for various reasons. In cold weather, a diesel may be very difficult to start so it is better to leave it running. Maybe the engine is needed to run heat or A/C for the sleeper cab.
driver of parked vehicle
If the other vehicle was parked, there was no other driver to have license, insurance or registration. The driver who hit the parked vehicle is at fault and is liable for all damages to the parked vehicle.
Not sure what vehicle you have but check the fuses. Some vehicles have separate fuses for left and right headlights.