My car has some sort of problem that makes it run on the rough side and be a bit sluggish. I have smelled some gasoline from time to time. One day recently I really could smell the gas so I opened the gas door and opened the gas cap and gas literally gushed out. Today, I could smell a little gas and opend gas door and saw a drop of gasoline dripping from the gas cap.



1. Is it common that a gas tank gets pressurized to the point of gas wanting to come out the gas cap?

2. If no to No. 1, what could cause such a thing to occur?

3. Is my gas cap bad as well?

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1999 Mercedes ML320
2002 Mercedes 230K

Which car???

The 1988 model might have as issue with charcoal cannister.

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MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

1988 300e

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1999 Mercedes ML320
2002 Mercedes 230K