Well after Installing a K&N Filter on my 88 300CE I have developed a MAF sensor problem. This was a mistake that I unknowingly made!!! Untill I have now read through the numerous posts on this forum I was unaware of this unfortunate event about to take place with my MAF sensor. I believe that there is a strong case here for a class action suite against K&N filters. I would really like to seek repairations from them... Anyone else who would like to attest this please contact me.