Denso (5326) IT20 Iridium Spark Plug is what you want. I bought mine at Amazon, but not changed it yet. Just changed plugs on my 05 C230 last week. I'm looking for a writeup too. If you are successful to find one or to do it yourself, please let me know. Thanks. Cooldad.
Spark Plug Replacement-LR3-4.0L-V6
- Thread starter snowwhite
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