So There is a continued debate about reisitor spark plugs vs non-resistor spark plugs. In MB engines that are equipped with non-resistor plugs from the factory many have said not to use resistor plugs. I have always used non-resistor plugs because I was afraid of getting a rough idle and stalling, etc., etc. Well after changing my O2 sensor yesterday, I bought 6- HR9DC (resistor) spark plugs and put them in. I have not noticed any weird idling or stuttering at all. I know this is all a matter of opinion, but I now know that I can safely order my plugs online instead of being raped at the dealership. Also, with the spark plug wires, does anyone know why MB combined Bosch boots with Beru wires? I saw a 92 190E at the junk yard and took a few photos of the wires. The boot is Bosch, but the wire is Beru. They are all original and even have the MB star logo on them.

Attached Thumbnails

       

__________________

1990 190E 3.0L