The plugs I installed are genuine MB, made in France. I think they are Beru.

NGK supplies a suitable non-resistor, I've got the reference somewhere for those interested. Oddly, these EZL failures all happened on the NGK plugs. I can't believe there's a correlation.

And then there's Champion C11YCC,, as stated by MB.

I've used MB, Beru, Bosch F8DC4 and NGK and never noticed any difference.

My last diagnosis will be measurements of the cable between the EZL and the coil. I've already verified this briefly but I'll do it now more aggressively by measuring the resistance whilst moving the cable to see if there's any intermittence.

And so it goes on.

R

R