I think I found the problem why my car will always have strong outside smell when I pass processing factory or idling behind a lorry, eventhough I set my aircond to air recirculation mode.

The vent, which located above the air intake of front passenger seat, is not closed properly. Tried to push with my finger, one of the flap seems loose to me.
Moreover, my cabin air filter, is cleaner on the inside intake compared to outside intake, which shouldnt be the case as I never switch on the outside air intake.

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Will ask SC to check during next service, but seems need to open dahsboard if need to change the part. They might ask to leave the car for the whole day 

eh i thought some bros here ald told that it's not 100% closed circulation due to some safety purposes?
like letting a little air in to avoid u getting drowsy during long distance drive??
bukan kah?