there could be a problem with the motor, or a burning glue gun in the car, or your simply crazy
There are a few reasons why your car might smell like fish. Fish could have been at one point stored in the car.
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
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.
look for a leaky fuel line
Car exhaust can smell like rotten eggs when the fuel has a lot of sulphur in it.
A car may smell like sweat due to gym clothes, or other workout clothes, being left in the car.
Your car will not neccessarily smell like Antifreeze if your water pump is going, in my personal experience it sounds like your HEATER CORE is shot. That is what usually makes that smell, unless you spilled some on the engine. Also, if the water pump was going the car would run hot and/or overheat.
Does it smell like crayons? If so, Beetles are known for that smell. I can't remember if it's the glue or the rubber used inside the car, but it would take a lot of money to remove it. My first NB was terrible, but my second isn't so bad. If you need more info you can Google "crayon smell Beetle" or join newbeetle.org Hope this helps! Summer