As a newbie to this site and forum, I have read with interest the reports (all positive) about using K&N air filters. I went to my local Kragen and special ordered one for my 1985 300SD. It came a few days later, and I could tell without even opening the box that it was not the correct shape or size. I asked the store to double check the product number which they did and assured me that it was correct. The problem was that my car is a California car and the 1985 SD came with the now infamous trap oxidizer, and also has a different filter (smaller around and much deeper) than all other 1985 models. Bottom line is K&N does not make an air filter to fit this car. My question is whether any other states required the trap oxidizer in 1985 or is this an "only in California" problem.
Thanks in advance for any responses. Love the site!