Before he left the forum - MB tech Arthur Dalton recommended NGK non-resistors to replace the Bosch H9DC/H9DCO non-resistor plugs - M103 motor -single cam 6 cyl. He actually felt the NGKs were superior to the "Made in Indonesia" Bosch plugs. I'm speaking figuratively. Indonesia = any 3rd world country that's producing low grade garbage......China/Vietnam/India/etc.

If NRs are what you seek, I would suspect that NGK has an alternative to the now defunct BOSCH NR line.

__________________
Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"