What would be the best spark plug for my 250se Benz? I understand that has to be without resistor. Gap?
Thank you for your input

The best no-resistor plugs I have been able to find are NGKs. I don't know which ones go into your engine, but they must be non-resistor because you have resistors in your plug connectors. Gaps are usually pre-set.

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Don't Chrome them; polish them

Thank you EZRider,
As I suspect that the spark plug wires were replaced by P.O. is there a way to check if they have an internal resistor?

i received this information recently and will forward it.
regards
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