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1999 S500 (W140)
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170 Posts
Discussion Starter · #1 ·
hhello,,,

I recently put in the irridium plugs?

dealer said i should stick to copper....


can anyone give any insight?

thanks...
 

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1999 S600V, 1999 M3 Cabrio
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52 Posts
I've put NGK Iridium plugs. They work wonderfully well. Its half the cost of original plugs from the dealer. While its important to keep things as original as possible - you certainly can take advantage of advancements in time. W140's used the best components at the time it was designed, developed and released. Since then there have been advancements. These Iridium plugs provide a better spark - which an aging engine can take advantage off. You don't go wrong with these Ir plugs. Enjoy.
 
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