Used these on a 2005 Chrysler Crossfire SRT6 (same engine as Mercedes SLK320) Replaced all coils and spark plug wires after changing spark plugs, did not fix any misfires. Using these wires and the wires below solved my misfire problem. I bought them along with: https://www.amazon.com/gp/aw/d/B07R6KW86W?psc=1&ref=ppx_pop_mob_b_asin_title
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