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I think it's probably the fuel cap not tight enough at the second time I refill the tank, some say i must drive at least 200miles to get rid of the light, some say it's a common thing for most bmw, it's actually a new car I don't think there's anything serious.
I'm not sure about removing the negative plug from the bat, they say it'll mess up with other systems such as automatic window.
There's a few Mercedes dealer arround my town, does anyone know if their computer system can get rid of the check engine light on the bmw?
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