I have a 1988 190 E 2.6L 5-Speed. Does that motor have CIS? I ask because the other day there was a discussion about CAIs and omegabenz mentioned that CIS Benzs " do better with a Mercedes air filter because the CIS throttle plate is calibrated for the resistance of the air filter". I currently have a K&N in.

BTW, I am mixed about the K&N debate. If I get just one more horsepower out that motor, I'll be happy. 158 horsepower never felt so slow. The car had the K&N in it when I bought it two years ago. Last month I cleaned and oiled it. But if it will work better with the stock MB filter, I'll get one. My wife just got a 2004 Volvo XC70 and I put a K&N in it. Who knows?

Thanks for your time.