{"product_id":"ignition-coil-spark-plugs-for-mercedes-benz-clk-class-2007-2009-5-5l","title":"Ignition Coil + Spark Plugs for Mercedes Benz CLK-Class (2007-2009) 5.5L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Ignition Coil and Spark Plug Kit for 2007-2009 Mercedes Benz CLK-Class 5.5L (W209 \/ M273)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Ignition Coil and Spark Plug Kit restores factory combustion efficiency and stabilizes cylinder pressure on the 2007-2009 Mercedes Benz CLK-Class by delivering consistent, high-voltage secondary discharge directly to each combustion chamber.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Mercedes Benz CLK-Class Ignition Breakdown\u003c\/h3\u003e\n\u003cp\u003eThe naturally aspirated 5.5L \u003cstrong\u003eM273\u003c\/strong\u003e V8 generates significant thermal load in the compact \u003cstrong\u003eW209\u003c\/strong\u003e engine bay. Over operational heat cycles, factory ignition coil potting compounds degrade, while silicone spark plug boots harden and develop micro-fissures. This leads to dielectric breakdown, secondary voltage arcing, and carbon tracking. Paired with aged spark plug electrodes exhibiting increased gap resistance, the ignition system triggers intermittent misfire diagnostic trouble codes (\u003cstrong\u003eP0300-P0308\u003c\/strong\u003e), sluggish throttle transition, and elevated exhaust gas temperatures.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive kit replaces failed electronics with eight direct-mount ignition coils featuring high-conductivity copper windings and heat-resistant epoxy insulation capable of withstanding intense thermal cycling. Paired with matching fine-wire platinum-alloy \u003cstrong\u003eNGK LKR7BGP\u003c\/strong\u003e spark plugs, the package reduces required arc strike voltage and optimizes flame front propagation. Reinforced silicone boots isolate secondary voltage leakage, ensuring immediate cylinder firing, balanced fuel burn, and restored factory output.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2007-2009 Mercedes Benz CLK-Class\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eM273.967 5.5L V8 \/ W209 (C209 \/ A209)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e382 hp \/ 391 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eUF535, 0001501980, 0001502680, 0001502780, 2729060060, NGK 95983\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2007 Mercedes Benz CLK-Class CLK550 5.5L V8 (M273)\u003c\/li\u003e\n  \u003cli\u003e2008 Mercedes Benz CLK-Class CLK550 5.5L V8 (M273)\u003c\/li\u003e\n  \u003cli\u003e2009 Mercedes Benz CLK-Class CLK550 5.5L V8 (M273)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the W209 CLK-Class?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2007-2009 Mercedes Benz CLK-Class equipped with the 5.5L M273 engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo these spark plugs require pre-gapping before installation?\u003c\/strong\u003e\u003cbr\u003e No, the included NGK spark plugs are pre-set to factory clearance specs, though verify gaps carefully prior to final installation.\u003c\/p\u003e\n\n\u003ch3\u003eThe Mercedes Benz Precision Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to meet stringent European onboard diagnostics parameters, this refresh maintains factory primary circuit resistance to eliminate check engine lights, preserve catalytic converters, and deliver smooth idle stability.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50625827373304,"sku":"DS-EWA8AAJLJ","price":248.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-spark-plugs-for-mercedes-benz-clk-class-2007-2009-5-5l-1.jpg?v=1790352076","url":"https:\/\/performancechiptuning.com\/fr\/products\/ignition-coil-spark-plugs-for-mercedes-benz-clk-class-2007-2009-5-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}