Currently a Mercedez filter and sensor
SOURCE: DODGE SPRINTER DIESEL
remove air cleaner...then remove the black engine cover....the filter is under it
SOURCE: buick regal 92 3.8L Horrible fuel mileage
Sounds like you might have an oxygen sensor problem. Your catalytic converter(s) maybe defective or dirty. That in turn can dirty up the oxygen sensor. A defective oxygen sensor will send faulty info to the computer, interpreting the fumes as cold (even when the engine warms up). That causes the computer to adjust the fuel mixture to very rich, giving you poor gas mileage and the fuel smell. Hope it helps.
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