I been searching the forum but having a difficult time deciding what spark plugs to purchase to avoid potential misfire issues after a tune. My tuner recommends running one step colder NGK plugs, but others say stock plugs works best (including Renntech but not my tuner). And I read on RADO's website that the best plug available for the biturbo AMG is the HKS Super Fire Racing spark plug - anyone have any experience with HKS Spark Plugs?

Thanks in advance
Ryan

I double checked with my tuner and stock plugs are recommended.

who is your tuner? seems AMS and renntech are recommending stock plugs

^Eurocharged.

From what I gathered on the forum and my tuner, stock plugs are recommended. As a preventative measure, I'm going to order a set of oem plugs. I have 37K miles on the plugs.