{"product_id":"ignition-coil-spark-plugs-for-mercedes-benz-s-class-2007-2011-4-7l-5-5l","title":"Ignition Coil + Spark Plugs for Mercedes Benz S-Class (2007-2011) 4.7L 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 Tune-Up Kit for 2007-2011 Mercedes Benz S-Class 4.7L, 5.5L (W221 \/ M273)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The ignition coil and spark plug kit restores factory spark energy and cylinder combustion efficiency on the 2007-2011 Mercedes Benz S-Class to eliminate secondary ignition misfires, rough idle, and unburned fuel dumping.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Mercedes Benz S-Class Heat-Induced Breakdown\u003c\/h3\u003e\n\u003cp\u003eIn the \u003cstrong\u003eW221\u003c\/strong\u003e engine bay, tightly packed packaging creates extreme thermal soak around the cylinder heads. Factory coils on the naturally aspirated \u003cstrong\u003eM273\u003c\/strong\u003e V8 suffer internal epoxy degradation, primary winding thermal breakdown, and dielectric boot dry-rotting over time. Simultaneously, factory spark plug electrode erosion widens the gap, increasing the secondary voltage demand required to jump the arc. This elevated electrical stress causes internal arcing inside fatigued coil packs, triggering P0300 through P0308 diagnostic trouble codes, cylinder deactivation limp modes, and accelerated catalytic converter fouling from unburnt hydrocarbons.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive tune-up kit replaces all eight coil packs and spark plugs simultaneously to balance secondary resistance across the entire firing order. The ignition coils utilize high-grade magnetic silicon steel cores with thermoset dielectric epoxy potting to resist thermal cycling and vibration. High-temperature silicone boots prevent flashover down the deep plug wells. Paired with fine-wire \u003cstrong\u003eNGK LKR7BGP\u003c\/strong\u003e platinum-tipped spark plugs, this setup ensures low arc-strike voltage thresholds, sharp flame-kernel propagation, and consistent dwell-time performance up to high-RPM load conditions.\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: solid font-size: min-width:\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;\"\u003e2007-2011 Mercedes Benz S-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 (4.7L \/ 5.5L V8) \/ W221\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;\"\u003e335–382 hp \/ 339–391 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\u003e2007-2011 Mercedes-Benz S550 5.5L V8 (M273.961 \/ W221)\u003c\/li\u003e\n  \u003cli\u003e2007-2011 Mercedes-Benz S550 4MATIC 5.5L V8 (M273.968 \/ W221)\u003c\/li\u003e\n  \u003cli\u003e2008-2011 Mercedes-Benz S450 4MATIC 4.7L V8 (M273.924 \/ Canadian Market W221)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the W221 S-Class?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2007-2011 Mercedes Benz S-Class equipped with the naturally aspirated \u003cstrong\u003eM273\u003c\/strong\u003e V8 engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShould anti-seize compound be used during spark plug installation?\u003c\/strong\u003e\u003cbr\u003e No, modern trivalent-plated NGK plug shells do not require anti-seize; apply factory torque specifications dry to prevent overtightening.\u003c\/p\u003e\n\n\u003ch3\u003eThe Mercedes Benz Precision Standard\u003c\/h3\u003e\n\u003cp\u003eMaintaining the refined balance of the \u003cstrong\u003eW221\u003c\/strong\u003e chassis demands tight electrical tolerances. This direct-replacement coil-on-plug kit maintains exact Bosch ME 9.7 ECU dwell-angle calibration, ensuring zero check engine lights, smooth linear power delivery, and restored fuel economy across all driving profiles.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50625815773432,"sku":"DS-EBVN5J5GW","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-s-class-2007-2011-4-7l-5-5l-1.jpg?v=1790351690","url":"https:\/\/performancechiptuning.com\/products\/ignition-coil-spark-plugs-for-mercedes-benz-s-class-2007-2011-4-7l-5-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}