Iridium
daidnik,
Thanks for the information. you make some excellent points. I can see an application for iridium, I just don't know if gasoline and oil engines are suited to small electrodes and long service life. Natural gas fired emergency generators would be one application, however.
My limited experience proved to be a disaster, fouled those Bosch iridium plugs in under 100 miles. I honestly forget what vehicle I put 'em in, maybe an older Benz. It may have been bad valve guides/seals, who knows? :crybaby2:
Anyway, I pull plugs every 15-25K to see how the firing chambers are functioning. I want to see wear, i want to see color, oil, fuel, whatever on the plugs. To be safe, I use what the dealer suggests, and if the owners manual suggests more than one option, I go with the Bosch. I never had an issue with Bosch copper plugs, call me an old fashioned, last century dinosaur.
I haven't touched my new to me '99 S420's engine yet, and you mention the iridium plugs are spec'd for the M119 engines '98 models. This should be an interesting experience for this old dog**shakes head**.
Hamada,
The dealer offered you Champions? I'm eating my hat as we speak! Ha, ha, ha. :wave: