2000 Chrysler 300 Cars interior smells like gas.

First of all, STOP driving your car immediately. You can definitely catch your car on fire, and possibly kill yourself from those fumes.

And you wont even know you're dieing, you'll just pass out!

Now, I can't really tell you a cost without knowing exactly where your fuel leak is coming from. But from the little info you gave, it sounds as though it's just a rubber hose or fuel line fitting around the fuel pressure regulator.

That's not expensive at all.

If you get a quote, get back with me and I'll tell you if it's fair.