We've had more than one MB owner have problems with the Mass Airflow Sensor because of the oil from the filter eventually coating the filter and ruining it. Be careful about this as it is not cheap to replace. Also, you should be aware that the K&N filter lets in more air at the expense of more dust. Not good for your engine!Someone please tell me: My K&N filter came in and I phoned my MB dealer to ask if he'd install it. He told me the oil and silicone (?) in the filter will make the "check engine" light go on. True or BS?
Thanks for your help [}]