Sorry I don't have a direct answer for you. It used to be that MB plugs were unusual in that they were non-resistor plugs. I am not 100% sure this is the case any longer. The 112/113 engine plugs DO have the MB star on them, making them at least a little "special", but if it really goes beyond just the star I am not sure. MB has changed the part numbers a couple times for this application, and usually they need a pretty good reason to change. For my own piece of mind, I'd go with the MB plugs. The current recommendation is a Beru "PLATIN" platinum spark plug.