Question about 1988 Mercedes-Benz 190

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I have a Mercedes A Class 1.6 LWB and when releasing the fuel tank cap the air sucks in . If left for several trips the cap is nearly impossible to remove. When removed one hears the air rush in and a rattling noise from the front of the car. Have replaced the cap but did not fix the problem. Where does the air get into the tank as the fuel is used up?

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You need to first check valve for activated charcoal canister and also check function purge valve.

Posted on Nov 15, 2012

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I have the same problem but the solution :
- check the valve positioned under the fuel tank and replace it

Posted on Nov 17, 2008

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