Q: The car smells of gas, probably has a leak

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Hi. I think my car is leaking gas somewhere. I can smell it on the outside of the vehicle. It comes through the vents of the AC. The smell is very noticeable if the car has been sitting for a while. I once smelt gas after the car was in the sun for over an hour. I haven't seen any leaks beneath the car anywhere. I took the car to the dealers. They were able to smell the gas but couldn't find the leak. They checked the welding and said it was fine. Other test they did on the car haven't shown any issue with the car. Could you give me some advice? It seems a bit unsafe to drive like this and nobody sees any issue. Thank you in advance.

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