Mercedes 450SL R107 Project: Spark Plug Replacement
 

Anyone got any questions on the Project: Spark Plug Replacement for your Mercedes 450SL R107?

Here's a back link to the original article: Pelican Technical Article: Spark Plug Replacement

-Wayne

What if the spark plug does not have a threaded cap? 1982 380sl

Platinum plugs??? Resistor plugs??

Only one of the plugs listed is generally considered acceptable. Platinum a no-no. The NGK non-resistor is the only plug that most knowledgeable owners would use.

Balderdaash - I put the Bosch Platinum Plus 4 plugs in my 1977 450 SLC with 32,000 miles. It runs MUCH better than before, smoother but seems to actually have more power. I have to be careful now not to leave rubber from a stop light.

Best thing I have done so far!!!!!!!!!!!!!!!!!

The NGK non-resistor is the only plug that most knowledgeable owners would use.
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Agreed. My '73 ran like crap with platinum plugs.