More than likely because its leaking.
If the gas smell is stronger in the trunk then that normally indicates that there is a leak in a fuel line around or on top of the tank...usually it is on top of the tank because dirt/salt ect can build up on the tank and the lines corrode...
If the smell is stronger inside the car then it could indicate a leak in the fuel line from the engine compartment to the center point of the car...
None the less if you are smelling gas then there is a leak somewhere in the system and you should have it checked before it catches fire and burns up...
Because there is gas in it.
If you have a motor other than the car such as a lawn mower in the trunk it smells. Also if you just got gas it smells.
I would use a spray that takes out smells.
The catalytic converter or a dead body in the trunk--you pick
There are a few reasons why your car might smell like fish. Fish could have been at one point stored in the car.
soap hot water sponge and Clorox to get rid of the smell febreeze!
my car smells like i have a petrol leak when i turn it on but have no leak underneath the car
Cats spraying your car with urine.
Leaking heater core
You would jump it much like a standard car but you would park the working car behind the BMW Z3 because the battery is in the trunk under the trunk mat. BMW does this to create more even weight distribution in the car.
If a car begins to smell like rotten eggs and then starts acting like it has bad gas, it may have been filled with the wrong type of fuel. This smell is common when diesel fuel is burned.
It probably has a leak, possibly from the heater core.